over lesson 1–5 a.a b.b c.c d.d 5-minute check 1 which expression can be used to represent...
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Over Lesson 1–5
A. A
B. B
C. C
D. D
Which expression can be used to represent fourteen less than twice the width?A. 14 – 2 + wB. 14 – 2wC. 2w + 14D. 2w – 14Which expression can be used to find the number of quarts in any number of gallons?
A.
B. q = 4gC. 4q = gD. 16q = g
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You have already graphed ordered pairs and relations on a coordinate system. (Lesson 1–4)
• Construct scatter plots.
• Analyze trends in scatter plots.
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• scatter plot
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Construct a Scatter Plot
BREAD The table shows the average cost of a loaf of bread from 1920–2000. Make a scatter plot of the data.
Let the horizontal axis, or x-axis, represent the year.Let the vertical axis, or y-axis, represent the cost.
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Construct a Scatter Plot
BREAD The table shows the average cost of a loaf of bread from 1920–2000. Make a scatter plot of the data.
Graph the ordered pairs (year, cost).
Answer:
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
BIRTH STATISTICS The table shows the number of babies born at Central Hospital during the past eight months. Make a scatter plot of the data.
A. B.
C. D.
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Example: The hours you study and your test average have a positive relationship (as your hours go up, so do your scores)
Example: The minutes a candle is burned and the height of the candle have a negative relationship (the longer you burn, the shorter the candle)
Example: The number of slices of pizza you eat and your shoe size (the is no obvious relation to these two pieces of data)
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Interpret Scatter Plots
Determine whether the scatter plot of the heights of basketball players and number of rebounds shows a positive, negative, or no relationship. Explain your answer.
As height increases, the number of rebounds increases.
Answer: positive relationship
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Determine whether the scatter plot of the weight of a car and its miles per gallon shows a positive, negative, or no relationship. Explain your answer.
.1
As the weight of the car (x-value) increases the miles per gallon (y-value) decreases.
Answer: negative relationship
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A. A
B. B
C. C
D. D
A. As the outside temperature increases, the heating bill will decrease. This is a negative relationship.
B. As the outside temperature increases, the heating bill will decrease. This is a positive relationship.
C. As the outside temperature increases, the heating bill will increase. This is a negative relationship.
D. Outside temperature and heating bill have no relationship.
Determine whether a scatter plot of the outside temperatures and the corresponding heating bill might show a positive, negative, or no relationship. Explain your answer.
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Analyze Scatter Plots
A. TEMPERATURE The table shows temperatures in degrees Celsius and the corresponding temperatures in degrees Fahrenheit. Make a scatter plot of the data.
Let the horizontal axis represent degrees Celsius and the vertical axis represent degrees Fahrenheit.
Graph the data.
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Analyze Scatter Plots
B. Draw a conclusion about the type of relationship the data shows. Explain.
Answer: A positive relationship is shown. As °C increase, so do °F.
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Analyze Scatter Plots
C. Predict the Fahrenheit temperature for 35°C.
By looking at the pattern on the graph, we can predict that the Fahrenheit temperature corresponding to 35°C would be about 95 degrees.
Answer: 95°F
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A. B.
C. D.
A. A
B. B
C. C
D. D
A. STUDY SKILLS The table shows hours spent studying for a test and the corresponding test score. Make a scatter plot of the data.
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A. A
B. B
C. C
D. D
B. STUDY SKILLS The table shows hours spent studying for a test and the corresponding test score. Does the scatter plot show a relationship between hours studied and a student’s test score?
A. Yes, a positive relationship exists.
B. Yes, a negative relationship exists.
C. No, no relationship exists.
D. none of the above
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A. A
B. B
C. C
D. D
C. STUDY SKILLS The table shows hours spent studying for a test and the corresponding test score. Predict the test score for a student who spends 7 hours studying.
A. between 65 and 70
B. between 75 and 80
C. between 95 and 100
D. between 105 and 110