Once again, you guys are helping me out heaps. Thanks! My maths teacher I believe has put many tricks into these questinos. I eventually need to find the gradient of this curve. I would normally isolate y, and then take the derivative. But I'm having issues isolating y. Any help is appreciated...thanks
Yep, I just worked it through to find what I was supposed to (the equation of the tangent where the gradient = -1, and the answer I think makes sense...
subbing in y'=-1, I solve for:
So the equation of the tangent where the gradient =-1 would be y=+-x? Does this make sense? Thanks