1. A researcher for a tire company has collected data about the stopping distance in feet for different tire designs. The data range from 59 to 74 with an average of 65. Would it be better to have the origin at 0 on the axis, or at some other value? Explain.(1 point)
A. No, 0 should only be included if the values are less than 10.
B. Yes, because 0 should always be included on the axis for a data set.
C. Yes, because all of the data values are less than 100, so 0 should be included.
D. No, because all of the data values fall in a small range which does not include or get close to 0.
2. Twelve people ordered calculators. The least expensive was $5.95 and the most expensive was $12.95. Half ordered a $9.95 calculator. Select the best estimate of the amount spent on calculators.(1 point)
A.$140
B.$160
C.$125
D.$90
3. Identify the form and direction, if appropriate, of the relationship of the data in the table below.
x −10 −5 −5 −4 −2 4 8 9
y 1 1.8 1.3 1.4 1.7 2.4 3 2.8
A. a negative linear relationship
B. a non-linear relationship
C. a positive linear relationship
D. no relationship
4. The table shows the number of regular-season NFL football games won by the winner of the Super Bowl for the years shown.
Year Regular-Season Games Won by Super Bowl Winner
2002 12
2003 14
2004 14
2005 11
2006 12
Source: National Football League
Identify the value of the correlation coefficient of the data in the table.
A. r=0
B.r=1
C. r=0.5
D. r=−1
5. A biology student is investigating the claim that the temperature can be predicted by counting cricket chirps. He has collected data and come up with the linear model T=39.2+0.233r, where T is the temperature in degrees Fahrenheit and r is the number of chirps per minute. Interpret the slope of the equation.(1 point)
A.T he model predicts an increase of 0.233 degrees for each increase of 1 chirp per minute.
B. The model predicts an increase of 39.2 degrees for each increase of 1 chirp per minute.
C. The model predicts a decrease of 39.2 degrees for each increase of 1 chirp per minute.
D. The model predicts a decrease of 0.233 degrees for each increase of 1 chirp per minute.
6. Identify the form and relationship for the values in the table.
Identify the form and relationship for the values in the table.
x −8 −6 −4 0 1 3 7 9
y 6.2 4.1 2.5 1.1 1 0.3 0.1 0.3
A. no relationship
B. a positive exponential relationship
C. a non-exponential relationship
D. a negative exponential relationship
7. A fisherman has collected data about the length in inches, L, and weight in ounces, w, of fish he has caught. Use the data in the table below to construct an equation for the line of best fit to predict weight from length. Round to three decimal places.
L 15 17 18 18 19 21 22 23
w 22 36 35 40 43 52 57 69
A. L=0.181+11.127w
B.L=11.127+0.181w
C.w=5.342−57.907L
D.w=−57.907+5.342L
1. D. No, because all of the data values fall in a small range which does not include or get close to 0.
2. B. $160
3. B. A non-linear relationship
4. C. r=0.5
5. A. The model predicts an increase of 0.233 degrees for each increase of 1 chirp per minute.
6. D. A negative exponential relationship
7. D. w=-57.907+5.342L