Question

Find the quadratic function: y=ax^2+c with a graph that includes (0,1/2) and (-3, 73/2)

Answer 1

plug in the points as x,y
this will yield 2 equations with 2 variables a,c
solve for a,c using substitution

Answer 2

--> 1/2 = 0+c
--> 73/2 = 9a +c