Posted by **isabella** on Tuesday, October 12, 2010 at 6:34pm.

f(t) = t2 − 1

Find the equation of the line tangent to the graph of f(t) at t = 5.

Enter the equation of the tangent line here (in terms of the variable t):

y =

- math -
**Reiny**, Tuesday, October 12, 2010 at 6:37pm
I am sure you meant

f(t) = t^2 - 1

f '(t) = 2t

when t = 5

f(5) = 24

so we have the contact point (5,24)

f '(5) = 10

so the slope of the line is 10

finish it by using the method you learned to find the equation of a line, given the slope and a point

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