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# Slope and one point

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### Slope and one point

1. 1. SLOPE AND ONEPOINT SLOPE AND ONE POINT
2. 2. Hey classβ.. Another method graphing a linear function is to plot a given point of the function and then identify another point using the given slope of the function.
3. 3. Graph each function y whose slope and one of its points are given. A. m=2; (3,2) B. m= , (0,7)β π π
4. 4. A.m=2; (3,2) Plot (3,2). The given slope is 2 = = . From the given point(3,2), go 2 units up, and then go 1 unit to the right. These steps give another point (4,4) of the function. Connect the points(3,2) and (4,4). REMEMBER !!! Rise: Positive means UP/ Negative means DOWN Run: Positive means RIGHT/ Negative means LEFT.
5. 5. Solution: A. m=2; (3,2) Plot (3,2). The given slope is 2 = = . (3,2) (4,4) Go up 2 units up Go 1 unit right y x
6. 6. B. m = , (0,2) From (0,2). Go 3 units down then 2 units to the right or go 3 units up then 2 units to the left. β π π
7. 7. B. m = , (0,2) β π π (0,2) (2,-1) (-2,5) (0,2)
8. 8. Identify the slope and a point of each function. Use them to graph the function. A. y=-2x+1 B. 2x-4y=4
9. 9. Solution: To easily identify the slope of the function, express it in the form y=mx+b. The value of m is the slope. Then find a point of the function. Remember: A.) y=-2x+1. The slope m=-2 If x=0, y=-2(0)+=1. Hence , (0,1) is a point of the function.
10. 10. a.) y=-2x+1 ο  m=-2 ,(0,1) y x (0,1) (1,-1)
11. 11. Solution: GRAPH The point (0,-1) on the gaph of 2x-4y=4 is also a point on the y-axis. The ordinate -1 is the y- intercept of the function. B.) 2x - 4y = 4 - 4y = - 2x + 4 y = x-1= -1 Thus,(0,-1) is a point of the function. y= x-1; m=1/2 If x=0; y = (0)-1=-1
12. 12. b.) y= x-1 ο  m= ,(0,-1) y x(2,0) (0,-1)
13. 13. Seatwork: Your turn ο A. Graph each function y whose slope and one of its points are given. 1. m= 3; (5,2) 2. m= ; (0,-3) B. Identify the slope and a point of each function. Use them to graph the function. 1. y=-3x+5 2. 10x-5y=-25
14. 14. A. 1.m= 3; (5,2) y x (6,5) (5,2)
15. 15. y x (-3,1) (0,-3) 2. m= (0,-3) (3,-7)
16. 16. y x (0,5) (1,2) B. 1.y=-3x+5 m=-3 (0,5)
17. 17. y x (0,5) (1,7) B. 2.10x-5y=-25 y=2x+5 m=2 (0,5)