11-4: TEKS Practice

  • 1. Which of the lines shown is a reasonable trend line for the scatter plot?

    A scatter plot with 3 trend lines f, g, and z.

  • 2. The scatter plot suggests a linear association between respiration and heart rates for adult males. Find an approximate equation for the trend line drawn for the data.

    A scatter plot with a trend line passing through approximately (30, 150) and (55, 210).

  • 3. Estimation The scatter plot suggests a linear trend in the population of a certain city over time. Two points that lie on the trend line drawn are (18,31) and (82,72). Estimate an equation for the trend line that is drawn for the data.

    A scatter plot with Years Since 1900 on the x-axis and Population (thousands of people) on the y-axis.

  • 4. Mental Math The scatter plot shows Leanna's elevation above sea level during her hike from the base to the top of a mountain. The plot suggests a linear association among the data. Two points that lie on the trend line drawn are (30,1070) and (75,1680).

    A scatter plot Elevation During Hike with Time After Starting (minutes) on the x-axis and Elevation (ft above sea level) on the y-axis.

    • a. Find an approximate equation for the trend line drawn.

    • b. Use mental math to find a similar equation if the base was 100 ft higher above sea level.


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Table of Contents

Digits, Grade 8, Volume 2, Homework Helper Unit D: Two-Dimensional Shapes Unit E: Measurement and Data Unit F: Personal Financial Literacy Unit G: Step-Up Lessons English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties