Question

The scatter plot shows the time spent watching TV, x, and the time spent doing homework, y, by each of 25 students last week.

Answer 1

The equation of line of best fit is

`y=-0.76x+26.04`

a. substitute x=12 into the equation

`y=-0.76(12)+26.04`

Calculate the value of y

`\begin{gathered} y=-9.12+26.04 \\ y=16.92 \end{gathered}`

The predicted time spent is 16.92 hours

b. For those who spent no time is 26.04

c. The right answer is

`-0.76`