The data on the graph show the foot lengths and forearm lengths for a group of people. The line of best fit for the data is shown. Use the equation of the line of best fit to predict the length of a person’s forearm if the length of their foot is 8 inches.

Question

A graph is labeled as Foot Length versus Forearm Length. The horizontal axis is labeled as Length of Foot left parenthesis inches right parenthesis and the vertical axis is labeled as Length of Forearm left parenthesis inches right parenthesis. The values on the horizontal axis range from 0 to 15 in increments of 1 and the values on the vertical axis range from 0 to 15 in increments of 1. Several points are scattered throughout the graph and a line is shown which passes between these points and the equation of the line is labeled as y equals 1 decimal point 1 1 x minus 0 decimal point 8 3.

A.
8.88 inches

B.
6.94 inches

C.
9.16 inches

D.
8.05 inches

Answer 1

you have the equation of the line of best fit: y = 1.11x - 0.83
So, what is y if x = 8 ?

Answer 2

Disagree. Multiply 1.11 by 8 and subtract .83.

Answer 3

I think the answer is 8.05
am i correct?

Answer 4

Yes you are correct it is D