1. ## [SOLVED] Finding the gradient of a point on a curve... help please??!!

This is a simple enough question, well at least i assume it should be, but it's stumping me somewhat, how they've derived the answer that they put.
can someone walk me through it? I dunno where i may be going wrong... I've been practicing similar questions with ok enough luck but this one, i dunno..
Given that y=x^3 - 12x, find the slope of the curve at the point P, where P = (1, -11). (Find the gradient of the secant slope)

2. Originally Posted by Ife
it's stumping me somewhat, how they've derived the answer that they put.
What was their answer? What have you tried? Have you learned the derivative formulas yet, or are you still doing approximations with secant lines?