What must be true about the average rate of change between any two points on the graph of an increasing function?

Answer with explanation:

Average Rate of Change between any two points

                  =Difference of y coordinates divided by Difference of x coordinates

⇒   If two points have coordinates , (x,y) and (a, b),then Slope is given by the formula

⇒For an increasing function , if

       b> y

then, a > x.

⇒⇒For, increase in value of x, value of y also increases for an increasing function or for any two points on the graph of an increasing function.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18