To find the rate of change, also known as the slope, we can use the slope formula with these two given points.
Point 1: (20, 25)
Point 2: (50, 40)
(40 - 25) / (50 - 20)
15 / 30
0.5
The rate of change of this function is $0.50 / lb.
Hope this helps!! :)
B.The sum of two rational numbers is rational.
C.The product of two irrational numbers is irrational.
D.The product of two rational numbers is rational.