15Alexie+Assignment+1

Page 209 #1-4

1.
 * X || Y ||
 * 10 || 7.95 ||
 * 11 || 7.53 ||
 * 12 || 7.18 ||
 * 13 || 6.83 ||
 * 14 || 6.43 ||
 * 15 || 6.33 ||
 * 16 || 6.13 ||
 * 17 || 6.10 ||

2.

3. This Cannot be Done on a Computer

4.

1. The older the age the less time it takes to run the mile.

2.

3. At first as the ages decrease the time decreases but after 14 years the time starts to increase and after 16 years the time starts to decrease again.

4. The girls graph is different from the boys graph because for the boys as age increases time decreases but for the girls as age increases time decreases, increases, then decreases again.

Page 215 #60 - 65

60.

Point of Intersection: (-5,2)

61.

Point of Intersection: (-8,11)

62. Point of Intersection: (1,-6)

63. Point of Intersection: (4,-4)

64. Point of Intersection: (0,-1)

65. Point of Intersection: (3,0)

Page 222 #44-55

44. y=x+2

__X intercept__ y=x+2

__y intercept__ y=x+2 y=0+2
 * -2=x**
 * y=2**

__Graph__



45. y=x-3

__x intercept__ y=x-3 0=x-3 __y intercept__ y=x-3 y=0-3
 * -3=x or (-3,0)**
 * y=-3 or (0,-3)**

__Graph__



46. y=4x+3

__x intercept__ y=4x+3 0=4x+3 -3=4x __y intercept __ y=4x+3 y=4(0) +3 y=0+3
 * -3/4=x or (-3/4,0)**
 * y=3 or (0,3)**

__Graph__

47. y=-6+3x

__x intercept__ y=-6+3x 0=-6+3x 6=3x 6/3=x __y intercept__ y=-6+3x y=-6+3(0)
 * 2=x** **or (2,0)**
 * y=-6** **or (0,6)**

__Graph__

48. y=5x+15

__x intercept__ y=5x+15 0=5x+15 -15=5x -15/5=x __y intercept__ y=5(0)+15 y=0+15
 * -3=x** **or (-3,0)**
 * y=15** **or (0,15)**

__Graph__

49. 2x+4y=16

__x intercept__ 2x+4(0)=16 2x+0=16 2x=16 x=16/2 __y intercept__ 2x+4y=16 2(0)+4y=16 0+4y=16 4y=16 y=16/4
 * x=8** **or (8,0)**
 * y=4** **or (0,4)**

__Graph__

50. -4x+3y=24

__x intercept__ -4x+3y=24 -4x+3(0)=24 -4x+0=24 -4x=24 x=24/-4 __y intercept__ -4x+3y=24 -4(0)+3y=24 0+3y=24 3y=24 y=24/3
 * x=-6** **or (-6,0)**
 * y=8** **or (0,8)**

__Graph__

51. x-7y=24

__x intercept__ x-7y=24 x-7(0)=24 x-0=24 __y intercept__ x-7y=24 0-7y=24 -7y=24
 * x=24** **or (24,0)**
 * y=24/-7** **or (0,24/-7)**

__Graph__

52. 6x-y=36

__x intercept__ 6x-y=36 6x-0=36 6x=36 x=36/6 __y intercept__ 6x-y=36 6(0)-y=36 0-y=36 -y=36
 * x=6** **or (6,0)**
 * y=-36** **or (0,-36)**

__Graph__

53. 2x+9y=-36

__x intercept__ 2x+9y=-36 2x+9(0)=-36 2x+0=-36 2x=-36 x=-36/2 __y intercept__ 2x+9y=-36 2(0)+9y=-36 0+9y=-36 9y=-36 y=-36/9
 * x=-18** **or (18,0)**
 * y=-4** **or (0,-4)**

__Graph__

54. 4x+5y=20

__x intercept__ 4x+5y=20 4x+5(0)=20 4x+0=20 4x=20 x=20/4 __y intercept__ 4x+5y=20 4(0)+5y=20 0+5y=20 5y=20 y=20/5
 * x=5** **or (5,0)**
 * y=4** **or (0,4)**

__Graph__ 55. 0.5y=-2x+8

__x intercept__

0.5y=-2x+8 0.5(0)=-2x+8 0=-2x+8 -8=-2x -8/2=x __y intercept__ 0.5y=-2x+8 0.5y=-2(0)+8 0.5y=0+8 0.5y=8 y=8/0.5
 * -4=x** **or (-4,0)**
 * y=4** **or (0,4)**

__Graph __