Question

Below are two different functions, f(x) and g(x). What can be determined about their slopes? f(x) George reads 200 pages in 40 minutes. x g(x) 2 −8 4 10 6 28

Answer 1

George reads 200 pages in 40 minutes. How many pages does he read in a minute?
m = 200 / 40
m = 20 / 4 
m = 5   George reads 5 pages every minute, so the slope is 5. 

g(x) passes through (2,-8) and (4,10)
Slope = (10 - (-8))  ÷ (4-2)
Slope = 18 ÷ 2 = 9
The slope of g(x) is 9.