Question

amount charged (in dollars per hour)
years of experience
(a) for these 25 dog sitters, as experience increases, the amount charged tends to increase.
(b) for these 25 dog sitters, there is a positive correlation between experience and amount charged.
(c) using the line of best fit, we would predict that a dog sitter with 9 years of experience would charge approximately select

Explanation:

Step1: Observe the scatter - plot trend

We see that as the years of experience (x - axis) increase, the amount charged per hour (y - axis) generally moves upwards. So, for part (a) the answer is increase and for part (b) it is a positive correlation.

Step2: Estimate from the line of best - fit

To answer part (c), we look at the line of best - fit on the scatter - plot. Locate the value of 9 on the x - axis (years of experience). Then, find the corresponding y - value (amount charged per hour) on the line of best - fit. By visual estimation, when x = 9, y is approximately 12.

Answer:

(a) increase
(b) a positive
(c) 12