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NAME____________________________
The table above gives data relating the number of oil changes per year to the cost of car repairs. Plot the data points on the grid provided.
1. Draw the best fit line. IS THIS A NEGATIVE OR POSITIVE CORRELATION?
2. Find the slope of the line. Note-pay attention to how the grid is numbered when you begin counting squares.
3. Describe what the slope represents according to the data.
4. Find the y-intercept.
5. Write the equation of the line.
6. Use the equation of the line to predict how much the engine repair would cost per year if the oil were changed 8 times. SHOW THE WORK.
NAME____________________________
The dosage chart above was prepared by a drug company for doctors who prescribe Tobramycin, a drug that combats serious bacterial infections such as those in the central nervous system, for life threatening situations.
1. Draw the best fit line. IS THIS A NEGATIVE OR POSITIVE CORRELATION?
2. Find the slope of the line. Note-pay attention to how the grid is numbered when you begin counting squares.
3. Describe what the slope represents according to the data.
4. Find the y-intercept.
5. Write the equation of the line.
6. Use the equation of the line to predict how much dosage a person who weighed 214 lbs. would need. SHOW THE WORK.
NAME____________________________
In BMX dirt bike racing, jumping high or getting air depends on many factors: the rider's skill, the angle of the jump, and the weight of the bike. Here are data about the maximum height for various bike weights.
1. Draw the best fit line. IS THIS A NEGATIVE OR POSITIVE CORRELATION?
2. Find the slope of the line. Note-pay attention to how the grid is numbered when you begin counting squares.
3. Describe what the slope represents according to the data.
4. Find the y-intercept.
5. Write the equation of the line.
6. Use the equation of the line to predict how much height someone would get if their bike weighed 30 pounds. SHOW THE WORK.
NAME____________________________
The graph compares the rate that crickets chirp to temperature in degrees Celsius.
1. Draw the best fit line. IS THIS A NEGATIVE OR POSITIVE CORRELATION?_____________
2. As the temperature increases what happens to the rate that the crickets chirp?
3. Find the slope of the line. Note-pay attention to how the grid is numbered when you begin counting squares.
4. Describe what the slope represents according to the data.
5. Find the y-intercept using the equation y= slope (x) + y intercept.
6. Write the equation of your best fit line.
7. Use the equation of the line to predict how often a cricket will chirp per a minute when the temperature is 45 degrees Celsius. SHOW THE WORK.
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