Question

The graph of y=-5x^2 + 9 passes through (1,2a) in the standard (x,y) coordinate plane what is the value of a? .

Answer 1

First you plug everything in to get
2a=-5 (1)^2+9 you do the powers and multiply
2a=-5 (1)+9
2a=-5+9
2a=4
a=2