Find approximate values for f′(x) at each of the x-values given in the following table. Use a right-hand approximation where possible. If a right-hand approximation is not possible, use a left-hand approximation
x 0 5 10 15 20
f(x) 85 70 55 40 20
Estimate Derivatives
Let P(a,f(a)) and Q(b,f(b)) be two neighbouring points on the curve y=f(x) where Q is the right point of P.
