The answer should be C 28 but could someone explain to me wh

The answer should be C) 28, but could someone explain to me why?

(D) I and II only (E) I, II, and . There is a linear relationship between the number of cricket chirps and the temperature of the air. A biologist developed the regression model = 24.9 + 3.5x, valid for values of x between 10 and 24. In this model, x is the number of chirps per minute and y is the predicted temperature in degrees Fahrenheit. What is the estimated increase in temperature that corresponds to an increase of 8 chirps per minute? (A) 3.5° (B) 24.9° (C) 28° (D) 28.4° (E) 52.9° has a vertical 25

Solution

y=24.9+3.5x

y=24.9+3.5(8)=52.9

estimated increase in temperature= 52.9-24.9 = 28degree

Correct option is c.