Thursday
April 24, 2014

Homework Help: math

Posted by ladybug on Saturday, September 15, 2012 at 11:28am.

can someone please help me with this question.

Given the funtion f(x)= 3x-9
a. find the rate of change between the two stated values for x: 7 to 8

b. find the equation of a secant line containing the given points: (7,f(7)) and (8,f(8))

I think I have (a)answered, just need help with b; please.

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