Let f(x) = 8x^2 -7x +5. Then the quotient f(10 + h)/h - f(10)/h can be simplified to ah + b when a = ? and b = ? I'm completly stumped on this one...I'm not even sure what they're asking!!! Is it saying that when x=10, the rate of change is given by the function ah + b? If so, why can't i just plug in the 10 into the derivative 16x -7 to find the slope of the tangeant line and find the equation that way ?