1. Learning Target
Students will be able to: Find x- and y-intercepts and interpret their meanings in real-world situations. And also to use x- and y-intercepts to graph lines.

2. The y-intercept is the y-coordinate of the point where the graph intersects the y-axis. The x-coordinate of this point is always 0.
The x-intercept is the x-coordinate of the point where the graph intersects the x-axis. The y-coordinate of this point is always 0.

3. Find the x- and y-intercepts.

4. Find the x- and y-intercepts.
5x – 2y = 10

5. Find the x- and y-intercepts.

6. Find the x- and y-intercepts.
–3x + 5y = 30

7. Find the x- and y-intercepts.
4x + 2y = 16

8. Trish can run the 200 m dash in 25 s
Trish can run the 200 m dash in 25 s. The function f(x) = 200 – 8x gives the distance remaining to be run after x seconds. Graph this function and find the intercepts. What does each intercept represent?
Neither time nor distance can be negative, so choose several nonnegative values for x. Use the function to generate ordered pairs.

9. The school sells pens for $2. 00 and notebooks for $3. 00
The school sells pens for $2.00 and notebooks for $3.00. The equation 2x + 3y = 60 describes the number of pens x and notebooks y that you can buy for $60.
Graph the function and find its intercepts.
Neither pens nor notebooks can be negative, so choose several nonnegative values for x. Use the function to generate ordered pairs.

10. Use intercepts to graph the line described by the equation.
3x – 7y = 21

11. Use intercepts to graph the line described by the equation.
y = –x + 4

12. Use intercepts to graph the line described by the equation.
–3x + 4y = –12

13. Use intercepts to graph the line described by the equation.
HW pp /13-33, 38-42even, 43 

14. Warm Up 1. 5x + 0 = –10 Solve each equation. –2 2. 33 = 0 + 3y 11 3. 1
4. 2x + 14 = –3x + 4 –2
5. –5y – 1 = 7y + 5

15. Express the relation {(1, 3), (2, 4), (3, 5)} as a table, as a graph, and as a mapping diagram.
x y
Table x y