Number Lines: Rates [TEKS Tools Grade 8]

This post specifically looks at how number lines can be used solve problems involving rates. Read more about TEKS Tools and their rationale here.

Number Lines

Number lines account for around 14% of each 8th grade STAAR test. These number lines are applied to solve problems related to rates, ordering numbers, similar shapes, and direct variation.

The main function of a number line is to solve problems involving rates, direct variation and proportionality, and to visualize ordering rational and irrational numbers. By visualizing these quantities on number lines, students can better make sense of the how the quantities are related.

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Graphing Rates

8.4B - graph proportional relationships, interpreting the unit rate as the slope of the line that models the relationship

Click on each > to expand

2023-16: a rate is given, students have to represent it on a graph

2023-26: a rate is given, students have to represent it on a graph

2024-11: a rate is given, students have to represent it on a graph

2024-40: a rate is given, students have to represent it on a graph

2025-1: a rate is given, students have to represent it on a graph

2025-28: a rate is given, students have to represent it on a graph