Hey Guys, i write math paper 1(Algebra) on friday and i'll post questions in here when i need help.

Okay the first one i need help with () :

I attached a rough sketch with the prob.

All that we are given is the equation of the pink line (y = -2x + 18) and that one right angle.

The question asks to find the maximum area of the red triangle.

This one really bowled me over, please help guys.