Question

If the point (-2,-3) is on the graph of y = f(x), what is the value of f(-2)?

Answer 1

When we plot graph of a function f(x), the points of the graph has the form:

`P=(x,f(x))`

So, if we know that the point (-2,-3) is in the graph, we have:

`(x,f(x))=(-2,-3)\rightarrow x=-2\text{ and }f(-2)=-3`

So f(-2)=-3.