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Find an equation of the tangent line to the graph of y = g(x) at x = 6 if g(6) = −2...

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pembe1 | Student, College Freshman | (Level 1) eNoter

Posted April 27, 2012 at 1:36 AM via web

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Find an equation of the tangent line to the graph of

y = g(x) at x = 6 if g(6) = −2 and g'(6) = 5.

Find an equation of the tangent line to the graph of

y = g(x) at x = 6 if g(6) = −2 and g'(6) = 5.

Express as an equation in terms of y and x.

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hala718 | High School Teacher | (Level 1) Educator Emeritus

Posted April 27, 2012 at 2:11 AM (Answer #1)

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g(6) = -2

g'(6) = 5

The equation of the tangent line is given by:

y-y1 = m (x-x1) such that: (x1,y1) is any point of the graph of g(x) , and m is the slope.

Given that g(6)= -2

==> Then, the point (6,-2) is on the graph.

==> Also, we know that the slope is the derivative at the point of tendency which is x= 6

Then, the slope is g'(6)= 5

==> m= 5

Now we will plug in the values.

==> y-(-2) = 5(x-6)

==> y+2 = 5x - 30

==> y= 5x - 32

Then, the equation of the tangent line is y=5x-32

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