What equation is slope = 2 and y-intercept =(0,9)

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

What properties allow transformation to be used as a problem solving tool