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? asked in Education & ReferenceHomework Help · 6 years ago

HELPP. FIND THE Y COORDINATE OF THE POINT OF TANGENCY?

Okay so the formula is Fx=3x^2 - 4x - 1. and I found the slope of the tangent line at x=1, which is m=2

Now it is asking me to find the y coordinate of the point of tangency? How do i do that?

2 Answers

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  • Anthony
    Lv 7
    6 years ago
    Favorite Answer

    To find the y coordinate, it's super easy. Just plug in x = 1 into the original function!

    f(1) = 3(1)² - 4 - 1 = 3 - 4 - 1 = -2 (no clue where the other poster got 21 or what division s/he is referring to btw)

  • ?
    6 years ago

    you have to divide, it's 21. You're welcome.

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