Thanks a lot for the help.
Well it's a tangent to the original equation, so I think that it's definitely correct.
Ah, I get it now. Thank you. So the equation for part b) is y-7x+29=0?
I turned x into x-1 which differentiates to -x-2 which I then multiplied by the numerators (2x and -5). Is that wrong?
I thought the derivative of x2-5x-24 would be 2x-5 (the 24 is zero)?
Thank you so much! It was finding the equation of AB that got me confused on this question. Much appreciated.