A graph titled Swimmers at City Pool has Temperature (degrees Fahrenheit) on the x-axis, and swimmers on the y-axis. A trend line goes through points (75, 25) and (85, 40).

Question

Compare the number of swimmers at City Pool and the outside temperature to make an interpolation.

What is the best estimate for the number of swimmers when the outside temperature is 75ºF?
15 swimmers
20 swimmers
25 swimmers
30 swimmers

Answer 1

To estimate the number of swimmers at a temperature of 75ºF using the trend line defined by the points (75, 25) and (85, 40), we can directly refer to the point (75, 25).

At an outside temperature of 75ºF, the estimation based on the data point (75, 25) indicates that there are approximately 25 swimmers at the pool.

Thus, the best estimate for the number of swimmers when the outside temperature is 75ºF is 25 swimmers.