The average rate of change is the distance between y values divided by the distance between x values. We know this as rise/run or slope for linear equations. For non-linear equations, we calculate the average over an interval.
This function has y-values of -1 at x=0 and 5 at x=2.
We add -1+5=6 and divide this by 2-0=2.
6/2=3.
The y-values on average change 3 units for every 1 unit of the x-values.
Justine > Ava > Emma 12 - 7.5 = 4.5 x + (x+4.5) +(x+12) = 3x + 16.5 = 63 63-16.3 = 56.7 56.7/ 3 = 18.9 A: Emma has $ 18.9 Ava has $23.4 Justin has $30.9
