Which equation below is a direct variation?

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?