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Graph x = 3 and y = -2

Step by step, with the reason for every step · Vertical and horizontal lines · Algebra 1

Step by step

The question

Question: graph x = 3 and y = −2.

x = 3 and y = −2

Two new words.

Vertical means straight up and down.

Horizontal means flat, going across.

vertical = up and down
horizontal = flat

1 Read the equations

x = 3 has only x: x is always 3.

It is a vertical line.

y = −2 has only y: y is always −2.

It is a horizontal line.

x = 3 → vertical
y = −2 → horizontal

2 Draw x = 3

Draw the grid.

The x-axis goes across.

The y-axis goes up and down.

They meet at 0.

That point is called the origin.

x = 3 crosses the x-axis at 3.

Draw a vertical line through it: straight up and down.

3 Draw y = −2

y = −2 crosses the y-axis at −2.

Draw a horizontal line through it: flat, across.

4 Where they meet

The lines meet at one point.

There x = 3 and y = −2.

So they meet at (3, −2).

(x, y) = (3, −2)

5 Check

Let's check: (3, −2) has x = 3, so it is on the first line.

It has y = −2, so it is on the second line too.

Right!

(3, −2): x = 3, y = −2

Let's look back.

First: read the equations.

Then: draw x = 3.

Then: draw y = −2.

Then: where they meet.

Last: check.

Answer
(x, y) = (3, −2)

Your turn

Try this one yourself, then check:

Graph x = 6 and y = −2
Show the answer
(x, y) = (6, −2)

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