Answer:
A person who watches 8.5 hours of TV can do 30.4 sit ups.
Explanation:
The regression equation is used to predict or estimate the value of the response (or dependent) variables using the information about the explanatory (or predictor) variables.
The general form of a regression equation is:

Here,
y = dependent variable
x = independent variable
a = intercept
b = slope
The regression equation representing the relationship between hours of TV watched per day (x) and number of sit ups a person can do (y) is:

Compute the number of sit ups a person who watches 8.5 hours of TV can do as follows:


Thus, a person who watches 8.5 hours of TV can do 30.4 sit ups.