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Math Help - display a function in y=mx+c

  1. #1
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    display a function in y=mx+c

    Given the function
    (i) Find the equation of the tangent to the function at the point x = 1 in the form

    where m and c are numbers. Express m and c as whole numbers and not decimals
    Put in your expression for
    how can this be done?
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  2. #2
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    Re: display a function in y=mx+c

    Quote Originally Posted by leonm92 View Post
    Given the function
    (i) Find the equation of the tangent to the function at the point x = 1 in the form

    where m and c are numbers. Express m and c as whole numbers and not decimals
    Put in your expression for
    how can this be done?
    The tangent is a straight line, so will have a gradient and a y intercept.

    You know a point that lies on the tangent, it's at x = 1 (what's the corresponding y value?)

    How are you going to evaluate the gradient of the tangent at that point? Hint: It's the same as the gradient of your curve at that point...
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