Does someone know the answer to this?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

What is the slope of the line that contains the points (-2,1) and (0,-3)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field