Question

Could someone please explain to me what they mean by this ?? without just giving me a bunch of confusing equations ..

Answer 1

They mean for you to find the value of y when x is -2

Answer 2

y=3

Answer 3

Yes , but how do i do that ?

Answer 4

right. So the function value at x = -2 is 3

Answer 5

plug in the value of x

Answer 6

Look at the graph.

Answer 7

The line is the function. If you choose an x value of -2, you can see that the y value is 3. The y value is called the function value since the line is a function.

Answer 8

Sometimes we write the equation of a line like this: y = 2x-7 but sometimes we use function notation and write it like this:
f(x)=2x-7