The temperature dropped from 75° to 50° what is the percent decrease in the temperature

Percent change is

(New - old) / old

50 - 75 / 75

25 / 75 = .33333333

To convert to a percent, multiply by 100

Percent decrease = 33.33%

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"