college algebra
posted by zachary .
given function f(X)=X^3+3x
findthe rate of change between the two stated values for x:1 to 2
find the equation of a secant line (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) 
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