Question

time spent watching tv, x, and the time spent doing homework, y, by each of 25 students last week. use the scatter - plot to answer (use the graphing tools to help you approximate the line.) (a) write an approximate equation of the line of best fit. round the coefficients to the nearest hundredth. y = - 0.5x + 15 (b) using your equation from part (a), predict the time spent doing homework for a student who spends 12 hours watching tv. round your prediction to the nearest hundredth. hours

Explanation:

Step1: Identify the given equation

The equation of the line of best - fit is $y=-0.5x + 15$.

Step2: Substitute the value of $x$

We are given that $x = 12$ (hours of TV - watching). Substitute $x = 12$ into the equation $y=-0.5x + 15$.
$y=-0.5\times12 + 15$

Step3: Perform the arithmetic operations

First, calculate $-0.5\times12=-6$. Then, $y=-6 + 15$.
$y = 9$

Answer:

9