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Warm-up. Make a T-Table and graph the equation. y = 2x + 2. x. y. -2. -2. 0. -1. 2. 0. 4. 1. 6. 2. y. 5. x. -5. -5. 5. Finding X and Y intercepts. Where the line crosses the y-axis. y -intercept = 3. (0, 3). What is an intercept?. (4, 0). x -intercept = 4. - PowerPoint PPT Presentation
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Finding X and Y intercepts
What is an intercept?
Where the line crosses the x-axis.
y
x
5
5
-5-5
(0, 3)y-intercept = 3
(4, 0)x-intercept = 4
Where the line crosses the y-axis.
X and Y Intercepts
Plug in 0 for y – this is the x-intercept
Plug in 0 for x – this is the y-intercept
Finding X and Y intercepts
y
x
5
5
-5
-5
(0, 2)
(3, 0)
2x + 3y = 62x + 3(0) = 6
2x = 6
2 2
x = 3
2x + 3y = 6
2(0) + 3y = 6
3y = 6
3 3
y = 2
Finding X and Y intercepts
y
x
5
5
-5
-5
(0, 2)
(4, 0)
4x + 8y = 164x + 8(0) = 16
4x = 16
4 4
x = 4
4x + 8y = 16
4(0) + 8y = 16
8y = 16
8 8
y = 2
Finding X and Y intercepts
y
x
5
5
-5
-5
(0, -2)
(4, 0)
x - 2y = 4x - 2(0) = 4
x = 4
x = 4
x - 2y = 4
(0) - 2y = 4
-2y = 4
-2 -2
y = -2
Cover up method
2x + 4y = 8 2x + 4y = 8
Solve for x and y.
Hint: Cover up the 4y first.
2x = 8
x = 4
Hint: Cover up the 2x this
time.
4y = 8
y = 2
y
x
5
5
-5-5
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