6 and 3 because I took the assignment as well
You use the equation Ax^2 + Bx + C to solve this equation.
The answer is 25.
I hope this helps :D
Study material specific to the GSCE and i would recommend flash cards or a study guide.
To find the equation, find the slope from the two points. The slope formula is (y1-y2)/(x1-x2). Plugging in the two points, you should get 3 as your slope.
As a line, the answer would be y=3x. Therefore, y=3x represents the function described.