Question 1133393
slope = rise/run = (y2 -y1)/(x2 -X1) where (x1,y1) and (x2,y2) are two points
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a)  slope = (x^2+3x-1 -3)/(x-1) = ((x+4)*(x-1))/(x-1) = x+4
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b)  slope = ((x+h)^2+3(x+h)-1 -(x^2+3x-1))/(x+h-x) = (x^2+2xh+h^2+3x+3h-1-x^2-3x+1)/h = (h^2+3h+2xh)/h = h+2x+3
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Note assume h is not equal to 0
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