1. SECTION 4-2
Using Intercepts

2. The x-intercept is where the line crosses the x-axis.
The y- intercept is where the line crosses the y-axis.

3. X-intercept: 2 Y-intercept:-4

4. Formula:
Ax+By=C

5. Example: What is the y-intercept of 2x+y=4 2(0)+y=4 y=4
The y-intercept is the y-coordinate of the point where the y-axis . Therefore y is equal to 4 because x=0.

6. Practice: Find the x and y intercepts
1. 4y-8=2x
2. 4x+y=8 3.

7. 4. y-x=-1
5. 2x+3y=18
6. x-3y=-1

8. Answers: 1. x-int. -4 Y-int. 2 2. x-int. 2 Y-int. 8
HOMEWORK PG.240 (1-12) odds