Based on data with -values between 15 and 30 and a correlation coefficient of 0.89

MATHEMATICS · Multi-part · AP · AP Statistics · Exploring Two-Variable Data · Exploring Two-Variable Data

Problem

Based on data with

y

-values between 15 and 30 and a correlation coefficient of 0.89, the following regression line is found:

x = 1.82y - 11.5

(a) Use this line to predict the value of

x

when - i

y = 20

- ii

y = 35

. (b) Comment on the reliability of your predictions in each case.