Numerical expressions use numbers and algebraic expressions use variables.
First of all, a positive average rate of change means that the function is increasing, so the answer can only be A->B or B->C.
The average rate of change is defined as

i.e. as the ratio between the vertical and horizontal gain.
In order to go from point A to point B, you gain 1 unit horizontally and 5 units vertically. So, the average rate of change is 5/1=5.
In order to go from point B to point C, you gain 1 unit horizontally and 3 units vertically. So, the average rate of change is 3/1=3.
Answer:
y=55x
given y=385
x=gallons of gas = 385/55 = 7 gallons
inverse function
y=55x
change x to y and y to x
x=55y
y=x/55
inverse function is x/55
Step-by-step explanation:
Answer:
9/25
Step-by-step explanation:
36% = 36/100 = 18/50 = 9/25
Answer:
You can buy 3 books 4 x 3 = 12
Step-by-step explanation: