Question

Does (-4, 5) make the equation y = -x - -9 true?
yes or no?

Answer 1

Yes

Explanation:

Plug in the values and see!

`y = -x - (-9)`

`y = -x + 9`

Now we plug in and see:

`5 = -4 + 9`

`5 = 5`

So yes, it makes it true.

Answer 2

No

Explanation:

Rewrite the equation. Get rid of the double negative.

y = -x + 9

Now if you put -4 into the equation, what happens?

y = -(-4) + 9

y = 4 + 9

y = 13

The point is not on the given line.