Thread: 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?

Originally Posted by leonm92

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...