Question

find a so that the point (-1,2) is on the graph of f(x)= ax^2+5

Answer 1

So what this is saying is that when you replace x with a value of -1, the computation youcome up with should be equal to 2. So in order to find the value of a, you would first set this up:

\[a(-1)^{2} + 5 = 2\]
Simply plug in the x-coordinate and know that the entire equation must then equal your y value. So given that, solve for a :)