The table compares x, the number of minutes of television sam watched each day, to y, the number of minutes she spent exercising. the function y = –0.78x + 95 models the data in the table.
which is the best prediction for the number of minutes of exercising sam will do if she spends 30 minutes watching television that day?
45 minutes
72 minutes
83 minutes
118 minutes

Given:
x = number of minutes of television watched per day
y = number of minutes she spent exercising

f(x) = -0.78x + 95

x = 30 minutes
y = -0.78(30) + 95 = -23.40 + 95 = 71.60 minutes ⇒ 72 minutes

x = 45 minutes
y = -0.78(45) + 95 = -35.10 + 95 = 59.90 minutes ⇒ 60 minutes

x = 72 minutes
y = -0.78(72) + 95 = -56.16 + 95 = 38.84 minutes ⇒ 39 minutes

x = 83 minutes
y = -0.78(83) + 95 = -64.74 + 95 = 30.26 minutes ⇒ 30 minutes

x = 118 minutes
y = -0.78(118) + 95 = -92.05 + 95 = 2.96 minutes ⇒ 3 minutes
 

None of the options you showed are it.