## 8th Grade Staar

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#### 8.2A

extend previous knowledge of sets and subsets using a visual representation to describe relationships between sets of real numbers

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#### 8.2B

approximate the value of an irrational number, including π and square roots of numbers less than 225, and locate that rational number approximation on a number line

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#### 8.2C

convert between standard decimal notation and scientific notation

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#### 8.2D

order a set of real numbers arising from mathematical and real-world contexts

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#### 8.3A

generalize that the ratio of corresponding sides of similar shapes are proportional, including a shape and its dilation

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#### 8.3B

compare and contrast the attributes of a shape and its dilation(s) on a coordinate plane

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#### 8.3c

use an algebraic representation to explain the effect of a given positive rational scale factor applied to two-dimensional figures on a coordinate plane with the origin as the center of dilation

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#### 8.4a

use similar right triangles to develop an understanding that slope, m, given as the rate comparing the change in y- values to the change in x- values, (y2 - y1 ) / (x2 - x1 ), is the same for any two points (x1 , y1 ) and (x2 , y2 ) on the same line

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#### 8.4B

graph proportional relationships, interpreting the unit rate as the slope of the line that models the relationship

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#### 8.4C

use data from a table or graph to determine the rate of change or slope and y- intercept in mathematical and real-world problems

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#### 8.5A

represent linear proportional situations with tables, graphs, and equations in the form of y = kx

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#### 8.5B

represent linear non-proportional situations with tables, graphs, and equations in the form of y = mx + b, where b ≠ 0

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#### 8.5C

contrast bivariate sets of data that suggest a linear relationship with bivariate sets of data that do not suggest a linear relationship from a graphical representation

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#### 8.5D

use a trend line that approximates the linear relationship between bivariate sets of data to make predictions

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#### 8.5F

distinguish between proportional and non-proportional situations using tables, graphs, and equations in the form y = kx or y = mx + b, where b ≠ 0

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#### 8.5G

identify functions using sets of ordered pairs, tables, mappings, and graphs

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#### 8.5H

identify examples of proportional and non-proportional functions that arise from mathematical and real-world problems

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#### 8.5I

write an equation in the form y = mx + b to model a linear relationship between two quantities using verbal, numerical, tabular, and graphical representations

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#### 8.6A

describe the volume formula V = Bh of a cylinder in terms of its base area and its height

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#### 8.7A

solve problems involving the volume of cylinders, cones, and spheres

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#### 8.7B

use previous knowledge of surface area to make connections to the formulas for lateral and total surface area and determine solutions for problems involving rectangular prisms, triangular prisms, and cylinders

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#### 8.7C

use the Pythagorean Theorem and its converse to solve problems

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#### 8.7D

determine the distance between two points on a coordinate plane using the Pythagorean Theorem

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#### 8.8A

write one-variable equations or inequalities with variables on both sides that represent problems using rational number coefficients and constants

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#### 8.8B

write a corresponding real-world problem when given a one-variable equation or inequality with variables on both sides of the equal sign using rational number coefficients and constants

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#### 8.8c

model and solve one-variable equations with variables on both sides of the equal sign that represent mathematical and real-world problems using rational number coefficients and constants

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#### 8.8D

use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles

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#### 8.9A

identify and verify the values of x and y that simultaneously satisfy two linear equations in the form y = mx + b from the intersections of the graphed equations

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#### 8.10A

generalize the properties of orientation and congruence of rotations, reflections, translations, and dilations of two-dimensional shapes on a coordinate plane

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#### 8.10B

differentiate between transformations that preserve congruence and those that do not

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#### 8.10C

explain the effect of translations, reflections over the x- or y- axis, and rotations limited to 90°, 180°, 270°, and 360° as applied to two-dimensional shapes on a coordinate plane using an algebraic representation

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#### 8.10D

model the effect on linear and area measurements of dilated two-dimensional shapes

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#### 8.11A

construct a scatterplot and describe the observed data to address questions of association such as linear, non-linear, and no association between bivariate data

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#### 8.11B

determine the mean absolute deviation and use this quantity as a measure of the average distance data are from the mean using a data set of no more than 10 data points

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#### 8.12A

solve real-world problems comparing how interest rate and loan length affect the cost of credit

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#### 8.12C

explain how small amounts of money invested regularly, including money saved for college and retirement, grow over time

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#### 8.12D

calculate and compare simple interest and compound interest earnings

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#### 8.12G

estimate the cost of a two-year and four-year college education, including family contribution, and devise a periodic savings plan for accumulating the money needed to contribute to the total cost of attendance for at least the first year of college