given the function fx=x^3+x
a) find the rate of change between the two stated values for x: 1 to 2
B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)
f(x) = x^3+x
f(1) = 2
f(2) = 10
slope is thus 8
The line is thus
y-2 = 8(x-1)