Math  /  Algebra

QuestionGraph the line with the equation y=x4y = x - 4.

Studdy Solution

STEP 1

What is this asking? Draw the line represented by the equation y=x4y = x - 4 on a coordinate plane. Watch out! Make sure to correctly interpret the equation and plot the points accurately.
Don't mix up the xx and yy values!

STEP 2

1. Find the y-intercept.
2. Find the x-intercept.
3. Plot the line.

STEP 3

To **find the y-intercept**, we set x=0x = 0 in our equation because the y-intercept is where the line crosses the y-axis, and the x-coordinate is always **zero** on the y-axis.

STEP 4

Substituting x=0x = 0 into y=x4y = x - 4, we get y=04y = 0 - 4.

STEP 5

So, y=4y = -4.
This means our **y-intercept** is at the point (0,4)(0, -4).

STEP 6

To **find the x-intercept**, we set y=0y = 0 because the x-intercept is where the line crosses the x-axis, and the y-coordinate is always **zero** on the x-axis.

STEP 7

Substituting y=0y = 0 into y=x4y = x - 4, we get 0=x40 = x - 4.

STEP 8

Now, we want to isolate xx.
We can do this by adding 4 to both sides of the equation: 0+4=x4+40 + 4 = x - 4 + 4.

STEP 9

This simplifies to 4=x4 = x, or x=4x = 4.
So, our **x-intercept** is at the point (4,0)(4, 0).

STEP 10

We have our two points: the **y-intercept** (0,4)(0, -4) and the **x-intercept** (4,0)(4, 0).
Let's plot these points on the graph!

STEP 11

Now, draw a straight line through these two points, extending it in both directions.
This line represents all the points that satisfy the equation y=x4y = x - 4.

STEP 12

The line passes through the points (0,4)(0, -4) and (4,0)(4, 0) on the coordinate plane.

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