
8th Grade Staar
TEKS
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