Question

Check my answer - C

Which of the following statements best describes the graph of x + y = 4?
It is a line which intersects the x-axis at (4, 4).
It is a line which intersects the y-axis at (4, 4).
It is a line joining the points whose x- and y-coordinates add up to 8.
It is a line joining the points whose x- and y-coordinates add up to 4.

Answer 1

Your answer is wrong, I believe.

Answer 2

Usually when you have an equation like this, it will have lines that intersect.

Answer 3

Have you ever heard of that?

Answer 4

@CderaAlien um im not sure

Answer 5

Here is an example.

Answer 6

The point where the lines intersect at is the solution to the equation.

Answer 7

Do you understand what I mean?

Answer 8

The reason why your answer is wrong is, because you added 4...and you can't do that with this type of equation.

Answer 9

At least, not when it's asking how it's graphed.

Answer 10

Oh! i see..

Answer 11

Which of the following statements best describes the graph of x + y = 4?

It is a line joining the points whose x- and y-coordinates add up to 4.

Answer 12

You can't give direct answers. ^^

Answer 13

You have to try to help them understand @skullpatrol

Answer 14

I agree, @CderaAlien.

But the question is tricky enough to justify letting the OP see how the answer is deduced from the question, imho.

Answer 15

Okay, I can't say I don't understand. Fair enough.

Answer 16

@queencel draw a table of x values and calculate the corresponding y values from the given equation.

$$\huge x + y = 4$$

Answer 17

Let x = 0, 1, 2, ...

Then plot the points on a coordinate plane.

:-)

Answer 18

That^ will help you understand why the other answer choices are wrong.

Answer 19

mhm got it!

Answer 20

Actually C is correct!

Answer 21

C says the x- and y-coordinates add up to 8?

But the equation says x + y = 4.