Question

When f(x)=4, what is the value of x?
O zero
O 2
O 3
O4

Answer 1

x = 2

Explanation:

f(x) is the range and values of x the domain

When f(x) = 4 the corresponding value of x in the domain is x = 2

Answer 2

2

Explanation:

this might not be the best explanation but this is how I thought of it.

f(0)=4? any number multiplied by zero equals zero so it is not the first answer.

f(2)=4? if f were to be 2, then 2*2 can equal 4 so this is a pretty good answer.

f(3)=4? there isn't a whole number you can multiply with 3 that will make 4 so this is not the answer.

f(4)=4? if f were to be 1 then this could be a possible answer.

so we know that it is either the 2nd or 4th answer. look at the table. if you look, 2 forms into 4 (because they multiplied 2 by 2). but 4 doesn't remain at 4 (because they did not multiply it by 1). so we know the answer is 2.