Mathematics

The graph of y = −5x^2 + 9 passes through (1,2a) in the standard (x,y) coordinate plane. What is the value of a ? F. 2 G. 4 H. 7 J. −1 K. −8

$y=-5x^2+9\\\\(1;\ 2a)\to\ for\ x=1;\ y=2a\\\\for\ x=1\\\\y=-5\cdot1^2+9=-5+9=4\\\\2a=4\ \ \ \ /:2\\\\a=2\\\\Answer:F.$