Which of the following lists of ordered pairs is a function?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

If you could answer these your a life saver

How many terms does the polynomial x^2 y^2 have