Question

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

a. f(–3) = –5
b. f(–3, –5) = –8
c. f(–5) = –3
d. f(–5, –3) = –2

Answer 1

a. f(–3) = –5

Explanation:

On a graph, point (x, y) can be also represented as function f (x) = y

it means that if f(x) has input value as x then its output value will be y.

Now given that in the problem that

The point (–3, –5) lies on the graph

it means that for function input value of of -3 has the out put value of -5

which can also be written as

f(-3) = -5

Hence the correct choice is a. f(–3) = –5.