If 10x10 grid represents 800 one square represents

Having a hard time understanding this question (see attachment).

What is the point slope form of a line with slope -5 that contains point (2,-1)

The graph of f(x) is obtained by reflecting the graph of f(x)=-3|x| over the x-axis. which equation describes f(x)? a) f(x)=3|x| b) f(x)=|x+3| c) f(x)=-3|x| d) f(x) = - |x+3|