Unit 3, Lesson 8
Using the Correlation Coefficient
Algebra 1
8.1
Warm-up
Putting the Numbers in Context
Match the variables to the scatter plot you think they best fit. Be prepared to explain your reasoning.
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| 1. | low temperature in Celsius for Denver, CO, on a given day | boxes of cereal in stock at a grocery store in Miami, FL, on a given day |
| 2. | number of free throws shot in a game | basketball team score in a game |
| 3. | measured student height in feet | measured student height in inches |
| 4. | number of minutes spent in a waiting room | hospital satisfaction rating given by patient |
AScatterplot, origin O. Horizontal from 0 to 8, by 1’s. Vertical from 0 to 80, by 10’s. 13 points that represent the data, clustered in the upper middle portion of the graph and trend linearly upward and to the right. First data point approximately begins at 4 point 8 comma 58 and last is approximately at 6 point 3 comma 74.
BScatterplot, origin O. Horizontal from 0 to 33, by 3’s. Vertical from 0 to 130, by 10’s. 20 points that represent the data, clustered in the upper middle portion of the graph and trend mostly upward and to the right. First data point approximately begins at 13 comma 80 and last is approximately at 25 comma 95. Highest point is approximately at 22 comma 120.
CScatterplot, origin O. Horizontal from 0 to 33, by 3’s. Vertical from 0 to 130, by 10’s. 21 points that represent the data, clustered together in the upper middle portion of the graph. A few data points in the center of the cluster are approximately 16 comma 95, 19 comma 105, and 21 comma 97.
DScatterplot, origin O. Horizontal from 0 to 135, by 15’s. Vertical from 0 to 10, by 1’s. 21 points that represent the data, clustered at the top left first and then widely spread, trend downward and to the right. First data point approximately begins at 7 point 5 comma 8 and last is approximately at 128 comma 5.