Question

The point (-3,-5) is on the graph for a function. Which equation must be true regarding the function?

Answer 1

Point (x,y) means x acts as the domain and y acts as the range. When you have (-3,-5), -3 acts as the domain and -5 acts as the range or f(x). The right function for (-3,-5) is
f(-3) = -5
option A

Answer 2

A. f(-3) = -5

Explanation:

We are given that,

The point (-3,-5) lies on the graph of the function f(x).

Now, we know that,

The point (x,y) implies that the 'y' is the value function at 'x' i.e. f(x) = y.

Substituting the values, we have that,

The point (-3,-5) gives us that -5 is the value of the function at -3.

That is, f(-3) = -5.

So, option A is correct.