The number 144 is rational because it can be expressed by 144/1
Count from each point to the x-axis across and go back out the same number on the opposite side of the x-axis
For instance from point d to the x axis is 2 so now start on the xaxis at -5,0 and go up 2 more so the new point for point D would be -5,2
The slope of the line 3.33 or 3 1/3
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F(x)/(x-a)=f(a)
Here a=4
So we need f(4)
F(4)=(4)^3 -1
F(4)=64-1=63
