Question

Which is f(–3) for the quadratic function graphed?

Answer 1

Assuming the question is for any general termed equation with constants a,b,c
Now,
Let f(x) be any function
Since it is mentioned the function is quadratic so,
Let,
f(x) =ax² + bx +c
where a,b.c are any constants as in mentioned in the assumption,
So,f(-3) will be
=9a -3b + c........1
Now,
If u want the solution graphically,
Then you can convert the equation in terms of standard parabola equation
(4ay=x²)
but still if you want to find the exact value then you need to use the equation and substitute the value -3
If you have the equation though then just substitute the value of constants in equation 1 and you will get the solution

Answer 2

The graph of a quadratic function gives the values of x and the corresponding values of y

f(-3) means the value of y when x = -3

We can read this from the graph by going to x= -3, we move up until we reach the graph, then we move horizontally to read the value of y.

This process is illustrated in the diagram below: