Question 143966
b. All y values are modified by -3. See my graphs:

original:
{{{graph( 300, 200, -5, 5, -10, 10, (x^3-7)/(x^2+1))}}}

-3
{{{graph( 300, 200, -5, 5, -10, 10, (x^3-7)/(x^2+1)-3))}}}