15nahmed+Wiki+Assignment+1

NAFIS AHMED Date of submission: December 3rd, 2010 Due Date: December 3rd, 2010 Date Assigned: November 11th, 2010 Math Block 8A Wiki Assignment 1 Topic: Page 209, Page 215, #60-65, Page 222 #44-55

Page 209: Making Scatter Plots

Solution

1. All of the data of the maximum time allowed for boys in the 1-mile run to qualify for the President's Physical Fitness Award.

2. Setting the window

3. Set Plot Type



4. Graph it:

Exercises


 * 1. Describe any patterns you see in the scatter plot you made.**

The maximum time allowed for boys decreases as the age goes up.


 * 2. Make a scatter plot of the maximum time allowed for the 1-mile run to qualify for the President's Physical Award**.

Data:

Put all of the data in a scatter plot The maximum time allowed for girls decrease as the age goes up but then it increases at 16, then drops by a little at 17.
 * 3. Describe any patterns you see in the scatter plot.**

The boys maximum time allowed decreases as the age goes up, its same for the girls except that at age 17 the time goes up. So the shape is different.
 * 4.How does this spatter plot differ from the scatter plot for the boy's times?**


 * Page 215, #60-65**

//Points of Intersection//

60. x = -5, y = 2 61. y = 11, x = -6 62. y = -6, x= 1 63. x = 4, y = -4 64. y = -1, x = 0 65. x = 3, y = 0


 * Page 222 #44-55**
 * Instructions: Find the x-intercept and the y-intercept of the line. Graph the equation. Label the points where the line crosses the axes.**


 * 44. y=x+2**

y-intercept: y=0+2 y=2

x-intercept: 0=x+2 0-2=x+2-2 -2=x




 * 45. y=x-3**

y-intercept: y=0-3 y=-3

x-intercept: 0=x-3 0+3=x-3+3 3=x




 * 46. y=4x+8**

y-intercept: y=(4x0)+8 y=8

x-intercept: 0=4x+8 0-8=4x+8-8 -8/4=4x/4 x=-2




 * 47. y=-6+3x**

y-intercept: y=-6+(3x0) y=-6

x-intercept: 0=-6+3x 0+6=-6+6+3x 6/3=3x/3 x=2



y-intercept: y=(5x0)+15 y=15
 * 48. y=5x+15**

x-intercept: 0=5x+15 0-15=5x+15-15 -15/5=5x/5 x=-3




 * 49. 2x+4y=16**

y-intercept: (2x0)+4y=16 4y/4=16/4 y=4

x-intercept: 2x+(4x0)=16 2x/2=16/2 x=8




 * 50. -4x+3y=24**

y-intercept: (-4x0)+3y=24 3y/3=24/3 y=8

x-intercept: -4x+(3x0)=24 -4x/-4=24/-4 x=-6




 * 51. x-7y=21**

y-intercept: 0-7y=21 -7y/-7=21/-7 y=-3

x-intercept: x-(7x0)=21 x=21




 * 52. 6x-y=36**

y-intercept: (6x0)-y=36 -y+y=36+y 0-36=36-36+y -36=y

x-intercept: 6x-0=36 6x/6=36/6 x=6




 * 53. 2x+9y=-36**

y-intercept: (2x0)+9y=-36 9y/9=-36/9 y=-4

x-intercept: 2x+(9x0)=-36 2x/2=-36/2 x=-18




 * 54. 4x+5y=20**

y-intercept: (4x0)+5y=20 5y/5=20/5 y=4

x-intercept: 4x+(5x0)=20 4x/4=20/4 x=5




 * 55. 0.5y=-2x+8**

y-intercept: 0.5y=(-2x0)+8 0.5y/0.5=8/0.5 y= 16

x-intercept: (0.5x0)=-2x+8 0+2x=-2x+2x+8 2x/2=8/2 x=4