STUDY GUIDE UNIT 2
[Pages:7]NAME
DATE
STUDY GUIDE ? UNIT 2
You will need a straightedge for this assessment. 1. Which graph represents a proportional relationship?
PERIOD
Answer C. ? It must be straight and through Origin (0,0)
2. The graph shows the cost in dollars of pounds of blueberries, a proportional relationship.
Select all the true statements.
A. 1 pound of blueberries costs $2.75. B. 2.75 pounds of blueberries cost $1. C. 5 pounds of blueberries cost $10.00. D. 12 pounds of blueberries cost $33. E. The point (2,6) is on the graph of the proportional relationship.
Open Up Resources ()
1
NAME
DATE
PERIOD
Answers: A and D ? The unit rate is $2.75 per pound (16.50 divided by 6)
A. Is the unit rate B. Incorrect has units backwards C. Incorrect 5 times 2 is 10 not 2.75 D. Double 6 and 16.50 you get 12 and 33 or 12 time 2.75 is 33 E. (2,6) has a constant or relationship of times 3 not 2.75
3. Andre rode his bike at a constant speed. He rode 1 mile in 8 minutes.
Which of these equations represents the amount of time (in minutes) that it takes him to ride a distance of miles?
A. = 8 B. = 1
8
C. = + 7 D. = - 7
Answer: A ? If he rode 1 mile in 8 minutes The rate is 8 minutes per mile Therefore you need to multiply the unit rate (8) by the miles to get the time. In this case the distance is your (x) and time is your (y)
We do not add or subtract in proportional relationships
Open Up Resources ()
2
NAME
DATE
PERIOD
4. The two lines represent the amount of water, over time, in two tanks that are the same size. Which container is filling slower? Explain how you know.
Answer line B.
At any spot on time (x axis) if you go up to lines , line B is less water ? therefore it is getting less water in same amount of time.
At any position aligned with y axis (Water) if you go across to lines, line A will be in less time, therefore it is getting more water in less time or line A is faster and B is filling slower.
Open Up Resources ()
3
NAME
DATE
PERIOD
5. The table shows the weights of apples at a grocery store.
number of apples
2 5 12
weight in kilograms
0.288 0.72 1.729
Complete the table so that there is a proportional relationship between the number of apples and their weight.
6. The equation = 9 + 32 relates temperature measured in degrees Celsius, , to
5
degrees Fahrenheit, . Determine whether there is a proportional relationship between and . Explain or show your reasoning.
It is not proportional because the equation includes addition.
Example:
If Celsius is 10 degrees 1.8 times 10 equals 18 then add 32 = 50 degrees F
If Celsius is 20 degrees 1.8 rimes 20 equals 36 then add 32 = 68 degrees F
50 divided by 10 = 5 68 divided by 20 = 3.4 They are not the same means not proportional
Open Up Resources ()
4
NAME
DATE
PERIOD
7. A recipe for salad dressing calls for 3 tablespoons of oil for every 2 tablespoons of vinegar. The line represents the relationship between the amount of oil and the amount of vinegar needed to make salad dressing according to this recipe. The point (1,1.5) is on the line.
A. Label the axes appropriately.
X axis (bottom) should be Vinegar and Y axis (side) should be Oil
B. Write an equation that represents the proportional relationship between oil and vinegar. Indicate the meaning of each variable.
Y = KX so Oil = 1.5 times Vinegar O=1.5V
C. Explain the meaning of the point (1,1.5) in terms of the situation.
When there is 1 tbs of Oil you need 1.5 tbs of Vinegar
Open Up Resources ()
5
NAME
DATE
PERIOD
8. Jada earns twice as much money per hour as Diego. Diego earns twice as much money per hour as Lin.
Select all the graphs that could represent how much Jada, Diego, and Lin earn for different amounts of time worked.
A.
D.
E. B.
C. Answers are B and C
Open Up Resources ()
6
NAME
DATE
PERIOD
9. Three runners are training for a marathon. One day, they all run about ten miles, each at their own constant speed.
? This graph shows how long, in minutes, it takes Runner #1 to run miles.
? The equation that relates Runner #2's distance (in miles) with time (in minutes) is = 8.5.
? Runner #3's information is in the table:
distance (miles) time (minutes)
2
18
4
36
6
54
8
72
10
90
Which of the three runners has the fastest pace? Explain how you know.
Runner #2 is the fastest at 8.5 minutes per mile
Runner #3 is 18 divided by 2 or 9 minutes per mile
Runner #1 is 10 minutes per mile y/x is 10 for any point
Open Up Resources ()
7
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- section 11 1 power functions and proportionality
- study guide unit 2
- correctionkey nl c ca c name class date 17 1 angles of
- cambridge international examinations cambridge ordinary level
- prediction of the constitutive equation for uniaxial creep
- the surface area are and the volume of n dimensional
- proportional relationships 16
- 7th grade week 6 davison community schools
- proportional damping from experimental data
- 205122orig1s000
Related searches
- photosynthesis study guide answers
- genesis study guide pdf
- 6th grade science study guide pdf
- biology 101 study guide printable
- ftce study guide pdf
- chapter 2 study guide answers
- biology 4.2 study guide answers
- 4 2 study guide overview of photosynthesis
- biology 4 2 study guide answers
- 10 2 study guide answers biology
- unit 2 microeconomics study guide
- unit 1 study guide biology