Posted by Sharon on .
How do I know if the points (2,15) lie on a parabola which has the equation y=x^26x7?

Math 
Henry,
(2,15), Y = X^2  6X 7.
When 2 is plugged into the equation,
you should get Y = 15 which proves that the point is on the parabola.
Y = 2^2  6 (2) 7 = 15