15akhan+Wiki+Assignment+1

Wiki Assignment 1: Due December 3, 2010
Ajwad Khan Block A Nov. 12, 10


 * Page 209:**


 * Solution**

Presidential Fitness Award (Mile) for boys.



1. Data

2. Set Window

3. Set to Scatter Plot

4. Graph




 * Exercises**

1. In the scatter plot above, the y value decreases as x increases. This means that as you get older, you have to decrease your mile time in order to get the presidential fitness award.

Presidential Fitness Award (Mile) for Girls

2.

3. Looking at this graph, I wouldn't say that there is a steady pattern. The graph has a meandering pattern. The time starts off quite high at 10 years old and starts to decrease. Then at the age of 14, it starts going the opposite way. Looking at the last point on the graph, it shows the time will decrease again.

4. This graph differs from the boys' graph because it is not continuously decreasing as age increases. This one has a serpentine pattern while the boys' graph has almost a straight line heading downwards.


 * Page 215 #60-65**

60. x=-5, y=2

61. y=11, x=-8



62. y=-6, x=1

63. x=4, y=-4



64. y=-1, x=0



65. x= 3, y=0




 * Page 222, #44-55**

__The x and y intercepts__

44. y=x+2 x-intercept=(-2,0) y-intercept=(0,2)



45. y=x-3 x-intercept=(3,0) y-intercept=(0,-3)



46. y= 4x+8 x-intercept= y-intercept=8



47. y=-6+3x x-intercept=(2,0) y-intercept (0,-6)



48. y=5x+15 x-intercept=(-3,0) y-intercept=(0,15)



49. 2x+4y=16 x-intercept=(8,0) y-intercept=(0,4)



50. -4x+3y+24 x-intercept=(-6,0) y-intercept=(0, 8)



51. x-7y=21 x-intercept=(21,0) y-intercept=(0,-3)



52. 6x-y=36 x-intercept=(-6,0) y-intercept=(0,-36)



53. 2x+9y=-36 x-intercept=(18,0) y-intercept=(0,-4)



54. 4x+5y=20 x-intercept=(5,0) y-intercept=(0,4)



55. 0.5y =-2x+8 x-intercept=(4,0) y-intercept=(0,16)