Use height as the independent variable and length of forearm as the dependent variable for the data collected from nine students.
Height (cm) Forearm (cm)
185. 9 ....................... 48.5
172.0 ....................... 44.5
155.0 ....................... 41.0
191.5 ....................... 50.5
162.0 ....................... 43.0
164.3 ....................... 42.5
177.5 ....................... 47.0
180.0 ....................... 48.0
179.5 ....................... 47.5
a. Name a good graphing window for your scatter plot.
b. Write a linear equation that models the data.
c. Write a sentence describing the real-world meaning of the slope of your line.
d. Write a sentence describing the real-world meaning of the y-intercept. Explain why this doesn't make sense and how you might correct it.
e. Use your equation to estimate the height of a student with a 50 cm forearm and to estimate the length of a forearm of a student 158 cm tall.