Male crickets chirp by rubbing their tront wings together. They chirp taster with increasing temperature and slower with decreasing temperatures. The following table shows the number of chirps per second for a cricket, recorded at 10 ditterent temperatu Chirps per second 20 16 19 18 18 16| 14 17 15 16 Temperature 88 73 91 85 82 | 75 69 82 69 83

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Male crickets chirp by rubbing their tront wings together. They chirp taster with increasing temperature and slower with decreasing temperatures. The tollowing table shows the number of chirps per second for a cricket, recorded at 10 difterent temperatu
Chirps per second 20
19 18 18 16 14 17 15
16
16
Temperature
85 82 75 69 82 69 83
88
73 91
A USE SALT
(a) Which of the two variables (temperature and number of chirps) is the independent variable, x?
O temperature
O number of chirps
Which of the two variables (temperature and number of chirps) is the dependent variable, y?
O temperature
O number of chirps
(b) Plot the data using a scatterplot.
y
90
90
20
20
85
85
18
18
80
80
16
..
16
75
75
14
.
70
14
70
70
75
80
85
90
14
16
18
20
70
75
80
85
90
14
16
18
20
How would you describe the relationship between temperature and number of chirps?
O Temperature and number of chirps per second show a positive linear relationship. As temperature increases chirps per second tends to be higher.
O Temperature and number of chirps per second show a negative linear relationship. As temperature increases chirps per second tends to be higher
O Temperature and number of chirps per second show a negative linear relationship. As temperature increases chirps per second tends to be lower.
O Temperature and number of chirps per second show a positive linear relationship. As temperature increases chirps per second tends to be lower.
(c) Find the least-squares line relating the number of chirps to the temperature. (Round your numeric values to three decimal places.)
y =
(d) If a cricket is monitored at a temperature of 79 degrees, what would you predict his number of chirps would be? (Round your answer to the nearest whole number.)
| chirps
Transcribed Image Text:Male crickets chirp by rubbing their tront wings together. They chirp taster with increasing temperature and slower with decreasing temperatures. The tollowing table shows the number of chirps per second for a cricket, recorded at 10 difterent temperatu Chirps per second 20 19 18 18 16 14 17 15 16 16 Temperature 85 82 75 69 82 69 83 88 73 91 A USE SALT (a) Which of the two variables (temperature and number of chirps) is the independent variable, x? O temperature O number of chirps Which of the two variables (temperature and number of chirps) is the dependent variable, y? O temperature O number of chirps (b) Plot the data using a scatterplot. y 90 90 20 20 85 85 18 18 80 80 16 .. 16 75 75 14 . 70 14 70 70 75 80 85 90 14 16 18 20 70 75 80 85 90 14 16 18 20 How would you describe the relationship between temperature and number of chirps? O Temperature and number of chirps per second show a positive linear relationship. As temperature increases chirps per second tends to be higher. O Temperature and number of chirps per second show a negative linear relationship. As temperature increases chirps per second tends to be higher O Temperature and number of chirps per second show a negative linear relationship. As temperature increases chirps per second tends to be lower. O Temperature and number of chirps per second show a positive linear relationship. As temperature increases chirps per second tends to be lower. (c) Find the least-squares line relating the number of chirps to the temperature. (Round your numeric values to three decimal places.) y = (d) If a cricket is monitored at a temperature of 79 degrees, what would you predict his number of chirps would be? (Round your answer to the nearest whole number.) | chirps
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