Question

time spent doing homework (in hours) time spent watching tv (in hours) (a) for these 25 st time spent watching tv increases, the time spent doing homework tends to (b) for these 25 st homework. (c) using the line r correlation between time spent watching tv and time spent doing approximately predict that a student watching 15 hours of tv would do homework for

Explanation:

Step1: Analyze the scatter - plot trend

As we can see from the scatter - plot, as the time spent watching TV increases, the time spent doing homework decreases.

Step2: Determine the correlation type

Since an increase in one variable (time watching TV) is associated with a decrease in the other variable (time doing homework), there is a negative correlation.

Step3: Estimate value from the line

We assume the line of best - fit is used for prediction. Locate 15 on the x - axis (time watching TV). Then, find the corresponding y - value (time doing homework) on the line of best - fit. By visual inspection of the line of best - fit, when x = 15, y is approximately 15.1 hours.

Answer:

(a) Decrease
(b) negative
(c) 15.1 hours