True or False?
When rainfall increases, the water level in the lake goes up. Rainfall is the independent variable in this situation. (4 points)
True
False
Question 2 (4 points)
(07.07)
Diana can earn money for the tickets she sells. Which of the following statements describes the variables in this situation correctly? (4 points)
a
The amount of money earned is the independent variable because it affects the number of tickets sold.
b
The amount of money earned is the dependent variable because it affects the number of tickets sold.
c
The number of tickets sold is the independent variable because it affects the amount of money earned.
d
The number of tickets sold is the dependent variable because it affects the amount of money earned.
Question 3 (4 points)
(07.07)
Calvin's plane is flying at a speed of 600 miles per hour. If y represents the distance the plane has traveled and z represents the time it has spent traveling, which of the following equations shows the relationship between y and z? (4 points)
a
y = 600 + z
b
z = 600 + y
c
z = 600y
d
y = 600z
Question 4 (4 points)
(07.07)
It costs $3.56 to buy a pack of pencils. Which of the following equations shows the amount of money needed, x, to buy k packs of pencils? (4 points)
a
x = 3.56k
b
k = 3.56x
c
x = 3.56 + k
d
k = 3.56 + x
Question 5 (4 points)
(07.07)
Christina built a small hot air balloon and recorded the distance it traveled. The table below shows the vertical distance traveled (v) during the first 4 seconds after starting (s).
Elapsed Time
(seconds) Distance Traveled
(feet)
1 1.2
2 2.4
3 3.6
4 4.8
Which of the following equations represents the relationship between the distance traveled and the elapsed time? (4 points)
a
v = 1.2s
b
s = 1.2v
c
v = 1.2 + s
d
s = 1.2 + v