college algebra
posted by zachary .
given the functionf(x)=x^3+3x find the rateof change between the two stated values for x:1 to 2
find the equation of a secant line containig the given points (1,f(1))and (2,f(2))

f(1) = 4
f(2) = 14
rate of change = slope = 10
line containing (1,4) with slope 10 is
(y4) = 10(x1)