Math  /  Geometry

Questione5f215874d2e4c3b1c6796601 and blue dots along the x -axis and y -axis to graph 3x+3y=18-3 x+3 y=18.

Studdy Solution

STEP 1

What is this asking? We need to graph the line described by the equation 3x+3y=18-3x + 3y = 18. Watch out! Make sure to simplify the equation before graphing to avoid unnecessary calculations!

STEP 2

1. Simplify the equation
2. Find the x-intercept
3. Find the y-intercept
4. Graph the line

STEP 3

Let's **simplify** our equation 3x+3y=18-3x + 3y = 18.
We can make things easier by dividing both sides of the equation by **3**.
Remember, as long as we do the same thing to both sides, the equation stays balanced!

STEP 4

Dividing both sides by 33 gives us: 3x3+3y3=183 \frac{-3x}{3} + \frac{3y}{3} = \frac{18}{3} x+y=6 -x + y = 6

STEP 5

Now, let's isolate yy to get the equation into slope-intercept form (y=mx+by = mx + b).
We can do this by adding xx to both sides of the equation: x+y+x=6+x -x + y + x = 6 + x y=x+6 y = x + 6 Much nicer, right?
This simplified form will make finding our intercepts a breeze!

STEP 6

The **x-intercept** is where the line crosses the x-axis.
This happens when y=0y = 0.
Let's substitute y=0y = 0 into our simplified equation: 0=x+6 0 = x + 6

STEP 7

Now, subtract 66 from both sides to solve for xx: 06=x+66 0 - 6 = x + 6 - 6 x=6 x = -6 So, our **x-intercept** is (6,0)(-6, 0)!

STEP 8

The **y-intercept** is where the line crosses the y-axis, which happens when x=0x = 0.
Substitute x=0x = 0 into our simplified equation: y=0+6 y = 0 + 6 y=6 y = 6 Awesome! Our **y-intercept** is (0,6)(0, 6).

STEP 9

Now for the grand finale!
We have our **x-intercept** at (6,0)(-6, 0) and our **y-intercept** at (0,6)(0, 6).
Plot these two points on your graph.

STEP 10

Draw a straight line through these two points, and voila!
You've graphed the line 3x+3y=18-3x + 3y = 18!

STEP 11

The graph of the line is determined by the x-intercept at (6,0)(-6,0) and the y-intercept at (0,6)(0,6).

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