Ms. MacKenzie's Jr High Chap 8 Test Prep

1. This PowerPoint
Covers about 90%
of What is on the
Chapter 8 Test

2. Solve for “y” in terms of “x”
Give 2 ordered
Get “y” alone Name m and b pairs
(0, -5)
m = 2
2y = 4x - 10 y = 2x - 5
(1, - 3)
b=-5
m = 4 (0, -3)
3y = 12x - 9 y = 4x - 3
b=-3 (1, 1)
m = no slope (- 5, 0)
x=-5 x=-5
b = none (- 5, 1)

3. Give 2 ordered
Solve for “y” Name m and b pairs
(0, -1)
m = 3
y = 3x - 1 y = 3x - 1
(1, 2)
b=-1
m = 4 (0, -2)
y = 4x – 2 y = 4x – 2 5
5 5 b=-2 (5, 2)
m = -3 ( 0, 3)
3x + y = 3 y = -3x + 3
b=3 ( 1, 0)

4. Give 2 ordered
Solve for “y” Name m and b pairs
(0, -5)
m = 3
2y = 6x - 10 y = 3x - 5
(1, - 2)
b=-5
m = 3 (0, -2)
4y = 12x - 8 y = 3x - 2
b=-2 (1, 1)
m = no slope (- 2, 0)
x=-2 x=-2
b = none (- 2, 1)

5. Give 2 ordered
Solve for “y” Name m and b pairs
(0, -2)
m = 3
y = 3x - 2 y = 3x - 2
(1, 1)
b=-2
m = 3 (0, -1)
y = 3x – 1 y = 3x – 1 5
5 5 b=-1 (5, 2)
m = -2 ( 0, - 3)
2x + y = - 3 y = -2x - 3
b=-3 ( 1, - 5)

6. Give 2 ordered
Solve for “y” Name m and b pairs
(0, -5)
m = 4
2y = 8x - 10 y = 4x - 5
(1, - 1)
b=-5
m = 2 (0, -3)
6y = 12x - 18 y = 2x - 3
b=-3 (1, -1)
m = no slope ( 4, 0)
x = 4 x = 4
b = none ( 4, 1)

7. Give 2 ordered
Solve for “y” Name m and b pairs
(0, -5)
m = 3
y = 3x - 5 y = 3x - 5
(1, - 2)
b=-5
m = 2 (0, -1)
y = 2x – 1 y = 2x – 1 5
5 5 b=-1 (5, 1)
m = -4 ( 0, - 3)
4x + y = - 3 y = -4x - 3
b=-3 ( 1, - 7)

8. Is
Name Name This
The The a
Relation Domain Range Function?
{(3,4),(4,6),(5,8),(6,10)} {3, 4, 5, 6} {4, 6, 8, 10} Yes
{(4,5),(3, 5),(2,2),(0,-3),(-1, 8)} {4, 3, 2, 0, -1} {5, 2, -3, 8} Yes
{(3,5),(4,7),(4,8),(6,10), (6, 12)} {3, 4, 4, 6, 6} {5, 7, 8, 10, 12} No
{(4,5),(3, 7), (1,2),(1, -3),(-2, -3)} {4, 3, 1, 1, -2} {5, 7, 2, -3} No
{(3,11),(4,7),(-4, 9),(6,12), (-3, 14)} {3, 4, -4, 6, -3} {11, 7, 9, 12, 14} Yes
{(4, 5),(5, 7),(1, - 3),(-2, - 3), (5, 2)} {4, 5, 1, -2, 5} {5, 7, -3, 2} No
{(2,8),(3,7),(4,6),(5,5), (6, 4)} {2, 3, 4, 5, 6} {8, 7, 6, 5, 4} Yes

9. Write a Rule….
Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a -2 3 8 13 -10 0 10 20
Table… Use
Increasing by “5” Increasing by “10” Division…
x y
What is the change in What is the change in
“y”? “x”? 5
-10 -2 = 1
5 10 10 2
0 3 What is the “y-intercept”?
What ordered pair
Would You Use to (0, 3)
10 8 find the “y-intercept b=3
1
20 13 m = 2 b = 3
Rule: y = 1x + 3
2

10. Write a Rule….
Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a -10 0 10 20 -5 0 5 10
Table… Use
Increasing by “10” Increasing by “5” Division…
x y
What is the change in What is the change in
“y”? “x”? 10
-5 -10 = 2
10 5 5
0 0 What is the “y-intercept”?
What ordered pair
Would You Use to (0, 0)
5 10 find the “y-intercept b=0
10 20 m = 2 b = 0
Rule: y = 2x + 0 or y = 2x

11. Write a Rule….
Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a 9 5 1 -3 0 2 4 6
Table… Use
Decreasing by “4” Increasing by “2” Division…
x y
What is the change in What is the change in
“y”? “x”? -4
0 9 = -2
-4 2 2
2 5 What is the “y-intercept”?
What ordered pair
Would You Use to (0, 9)
4 1 find the “y-intercept b=9
6 -3 m = -2 b = 9
Rule: y = -2x + 9

12. Write a Rule…. Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a -7 0 7 14 -1 0 1 2
Table… Use
Increasing by “7” Increasing by “1” Division…
x y
What is the change in What is the change in
“y”? “x”? 7
-1 -7 = 7
7 1 1
0 0 What is the “y-intercept”?
What ordered pair
Would You Use to (0, 0)
1 7 find the “y-intercept b=0
2 14 m = 7 b = 0
7
Rule: y = 5

13. Write a Rule…. Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a -2 -5 -8 -11 -2 0 2 4
Table… Use
Decreasing by “3” Increasing by “2 Division…
x y
What is the change in What is the change in
“y”? “x”? -3
-2 -2 -3
=
-3 2 2 2
0 -5 What is the “y-intercept”?
What ordered pair
Would You Use to (0, -5)
2 -8 find the “y-intercept b = -5
-3
4 -11 m = 2 b = -5
3
Rule: y=- x-5 2

14. Write a Rule….
Use this
Find the Find the information to find
change in “y” change in “x” the slope (m)
We Need a 7 2 -3 -8 -6 0 6 12
Table… Use
Decreasing by “5” Increasing by “6” Division…
x y
What is the change in What is the change in
“y”? “x”? -5
-6 7 -5
=
-5 6 6 6
0 2 What is the “y-intercept”?
What ordered pair
Would You Use to (0, 2)
6 -3 find the “y-intercept b=2
-5
12 -8 m = 6 b = 2
5
Rule: y=- x+2 6

15. Graph the System
3y = 3x + 15 2y = -4x + 16
Solve for “y” Solve for “y”
y=x + 5 y = -2x + 8
Name the slope Name the slope
m = 1 m = -2
Name y intercept Name y intercept
b=5 b= 8
Name 2 Name 2
Ordered Pair Ordered Pair
(0, 5) (1, 6) (4, 0) (2, 4)
Intersect (- 5, 1)
(0,5)

16. Graph the System
2y = 8x - 10 3y = 12x + 6
Solve for “y” Solve for “y”
y = 4x - 5 y = 4x + 2
Name the slope Name the slope
m = 4 m = 4
Name y intercept Name y intercept
b=-5 b= 2
Name 2 Name 2
Ordered Pair Ordered Pair
(0, -5) (1, -1) (0, 2) (1, 6)
Parallel (- 5, 1)
No solution