Describes the function y = -2 x + 5?

Which of the following is true for the relation f(x)=2x^2+1

If the equation of a perpendicular bisector of a triangle is y = 2x + 7, what is the slope of the side that it is bisecting? explain how you know. 

3. simplify. 312⋅312 4. rewrite n√xm using a rational expression.