4A. The table shows the price of a video game for different years
since the game was released. During which time interval did the
price decrease at the greatest rate?
 2 0 0 0, 5 8  ;  2 0 0 2, 5 4 
2

54  58
2002  2000
m 

R ise
R un
4
 2
2

y
x

y 2  y1
x 2  x1
4A. The table shows the price of a video game for different years
since the game was released. During which time interval did the
price decrease at the greatest rate?
 2 0 0 0, 5 8  ;  2 0 0 2, 5 4 
 2 0 0 2, 5 4  ;  2 0 0 3, 5 0 
2

4
50  54
2003  2002
m 

R ise
R un
4
 4
1

y
x

y 2  y1
x 2  x1
4A. The table shows the price of a video game for different years
since the game was released. During which time interval did the
price decrease at the greatest rate?
 2 0 0 0, 5 8  ;  2 0 0 2, 5 4 
2

4
 2 0 0 2, 5 4  ;  2 0 0 3, 5 0 
 2 0 0 3, 5 0  ;  2 0 0 5, 4 4 
3
44  50
2005  2003
m 

R ise
R un
6
 3
2

y
x

y 2  y1
x 2  x1
4A. The table shows the price of a video game for different years
since the game was released. During which time interval did the
price decrease at the greatest rate?
 2 0 0 0, 5 8  ;  2 0 0 2, 5 4 
2

4
3
1 / 2
43  44
2007  2005
m 
 2 0 0 2, 5 4  ;  2 0 0 3, 5 0 
 2 0 0 3, 5 0  ;  2 0 0 5, 4 4 
 2005, 44  ;  2007, 43 

R ise
R un
1

2

y
x
1
2

y 2  y1
x 2  x1
4B. This table shows the U.S. federal minimum hourly wage in
different years. During which time interval did the wage increase
at the greatest rate?
1979, 2.90 ; 1980, 3.10

0 .2 0

3.10  2.90
1980  1979
m 

 
0.20
R ise
R un

 0.20
1

y
x

y 2  y1
x 2  x1
4B. This table shows the U.S. federal minimum hourly wage in
different years. During which time interval did the wage increase
at the greatest rate?
1979, 2.90 ; 1980, 3.10
0 .2 0


 

 1 9 8 0, 3 .1 0  ; 1 9 8 1, 3 .3 5 
0 .2 5
3.35  3.10
1981  1980
m 

0.25
R ise
R un
 0.25
1

y
x

y 2  y1
x 2  x1
4B. This table shows the U.S. federal minimum hourly wage in
different years. During which time interval did the wage increase
at the greatest rate?
1979, 2.90 ; 1980, 3.10
0 .2 0

0 .2 5

 

 1 9 8 0, 3 .1 0  ; 1 9 8 1, 3 .3 5 
 1 9 8 1, 3 .3 5  ; 1 9 9 0, 3 .8 0 
0 .0 5
3.80  3.35
1990  1981
m 

0.45
R ise
R un
 0.05
9

y
x

y 2  y1
x 2  x1
4B. This table shows the U.S. federal minimum hourly wage in
different years. During which time interval did the wage increase
at the greatest rate?
1979, 2.90 ; 1980, 3.10
0 .2 0

0 .2 5
0 .0 5
0 .4 5
4.25  3.80
1991  1990
m 

 

 1 9 8 0, 3 .1 0  ; 1 9 8 1, 3 .3 5 
 1 9 8 1, 3 .3 5  ; 1 9 9 0, 3 .8 0 
 1 9 9 0, 3 .8 0  ; 1 9 9 1, 4 .2 5 

0.45
R ise
R un
 0.45
1

y
x

y 2  y1
x 2  x1
5A. The slope of this line is ________.
m 
R ise
R un

y
x

y 2  y1
x 2  x1
y  mx  b
y  2 x  2
x  1
y  2
y
2
m 

x
1
5B. Find the slope of this line.
m 
R ise

R un
y
x

y 2  y1
x 2  x1
y  mx  b
y
y  5
m 
5
x4
2
y
x
x  2

5
2
6A. Find the slope of the line that contains the points (6, 8) and
(2, 1).
m 
R ise
R un
m 

y
x
1 8
26


y 2  y1
x 2  x1
7
4

7
4
W rite the equation of the line in point-slope form .
y  y 1  m  x  x1 
y 1 
7
4
 x  2
6B. Find the slope of the line that contains the points (1, -1) and
(-2, 8).
m 
R ise
R un
m 

y
x
8 1
2  1


y 2  y1
x 2  x1
9
3
 3
W rite the equation of the line in point-slope form .
y  y 1  m  x  x1 
y  1   3  x  1
5. T he table show s the distance traveled by a car during a
5-hour road trip.
Time (h)
0
Distance (mi) 0
a) Graph the
b) During
1
40
2
80
3
80
4
110
5
160
data and show the rates of change.
which hour was
the car' s average speed the greatest?
D h 
40 m ph
50 m ph
40 m ph
0 m ph
30 m ph
distance (mi)
160
120
80
40
From the 4th to the 5th hour,
average speed was the greatest.
1 2
3 4
time (h)
5 h
9. Find the slope of the line.
m 

y 2  y1
y
8
x 2  x1
6
4
3  5
52
2
–8
–6
–4
–2
2

3
–6
–8
6
(5, –3)
–2
–4
2
4
(2, –5)
8
x
10. Find the slope of the line.
y
10
m  0
8
6
(–4, 3)4
(6, 3)
2
–10 –8
–6
–4
–2
–2
–4
–6
–8
–10
2
4
6
8
10
x
11. Tell whether the slope of the line is positive, negative,
zero, or undefined.
y
5
4
m is u n d efin ed
3
2
1
–5
–4
–3
–2
–1
–1
–2
–3
–4
–5
1
2
3
4
5
x
12. Find the slope of the line described by x – 3y = –6.
x
x
3 y   x  6
3 3
m 
1
3
y 
1
3
3
x2