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Quizzes Pencil and calculators only.. X- and Y- Intercepts Objective: To identify the x- and y- intercepts. Standard 6.0.

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Presentation on theme: "Quizzes Pencil and calculators only.. X- and Y- Intercepts Objective: To identify the x- and y- intercepts. Standard 6.0."— Presentation transcript:

1 Quizzes Pencil and calculators only.

2 X- and Y- Intercepts Objective: To identify the x- and y- intercepts. Standard 6.0

3 Intercepts X-Intercept: where the line crosses the x-axis ordered pair: (x,0) Y-Intercept: where the line crosses the y-axis Ordered pair: (0,y) Y-intercept X-intercept

4 Example 1 State the x- and y- intercepts x-intercept: y-intercept: (-4,0) (0,2)

5 TOO State the x- and y- intercepts x-intercept: y-intercept: (3,0) (0,6)

6 Example 3 State the x- and y- intercepts x-intercept: y-intercept: (5,0) none Will this vertical line ever cross the y-axis? no

7 Cover up Method! If an equation is in standard form ax + by = c a,b,c are all #’s Cover up method: To find x-intercept, cover up the y To find y-intercept, cover up the x Example: 5x + 4y = 20 y-intercept: (0,5) x-intercept: (4,0)

8 Examples 5 & 6 6x + 3y = -18 y-intercept: (0,-6) x-intercept: (-3,0) x – 4y = 14 y-intercept: (0,-7/2) x-intercept: (14,0)

9 TOO Write the x- and y- intercepts as ordered pairs 3y = 2x x – 3y = 20 (0,4) (-6,0)

10 Review – Write an equation in point-slope (-4,3) m = 1 7 (6,-2)(5,7)

11 Review – Write an equation in Standard Form (5,-15)(11,-3)y+5 = -4(x+1)

12 Review – Write an equation in Standard Form (8,-7) m = undefined(9,-2) m = 0

13 Homework Pg. 350 #19-21 a & b, Write the intercepts as an ordered pair X-intercept: (#,0) Y-intercept: (0,#)

14 Monster Problem Time!!


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