1. The price of tomatoes went from $1.12 per lb to $1.96 per lb over 3 years. Find the average rate of change of the price of to
matoes.
A. $0.85 per lb per year
B. $0.66 per lb per year
C. $0.62 per lb per year
D. $0.28 per lb per year
2. The graph represents Jason's speed on a recent trip. For which time period is his rate of change constant?
A. between 0 and 5 minutes
B. between 5 and 10 minutes
C. between 10 and 20 minutes
D. between 20 and 25 minutes
A. $0.85 per lb per year
B. $0.66 per lb per year
C. $0.62 per lb per year
D. $0.28 per lb per year
2. The graph represents Jason's speed on a recent trip. For which time period is his rate of change constant?
A. between 0 and 5 minutes
B. between 5 and 10 minutes
C. between 10 and 20 minutes
D. between 20 and 25 minutes
1 answer:
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Answer:
a)
We have a perfect linear relationship between the two variables
b)
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
c) For this case the slope indicates that for each increase of the number of hours in 1 unit we have an expected increase in the score about 6 units.
And the intercept 5 represent the minimum score expected for any game
Step-by-step explanation:
We have the following data:
Number of hours spent practicing (x) 0 0.5 1 1.5 2 2.5 3 3.5 4
Score in the game (y) 5 8 11 14 17 20 23 26 29
Part a
The correlation coefficient is given:
For our case we have this:
n=9
We have a perfect linear relationship between the two variables
Part b
Where:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
Part c
For this case the slope indicates that for each increase of the number of hours in 1 unit we have an expected increase in the score about 6 units.
And the intercept 5 represent the minimum score expected for any game