a) Positive or negative correlation? ___________________
(If no grid is available, describe where your line passes through two approximate points.) An ice cream shop records daily high temperature (°F) and ice cream sales ($).
| Age (years) | 1 | 2 | 3 | 4 | 5 | 6 | 8 | |-------------|---|---|---|---|---|---|---| | Price ($1000)| 20| 18| 15| 13| 10| 8 | 4 | lesson 2 homework practice lines of best fit
c) If x = 8, what is the predicted y-value? ___________________ Find a set of real-world bivariate data online or in another class (e.g., height vs. shoe size, years of education vs. salary). Create a small scatter plot and draw a line of best fit. Write the equation and one prediction. Teacher’s Tip: For questions involving drawing, encourage students to use a ruler and aim for a line that has roughly the same number of points above and below it.
(2, 4), (3, 5), (4, 7), (5, 8), (6, 9), (7, 12), (8, 14) a) Positive or negative correlation
| Temp (°F) | 65 | 70 | 72 | 78 | 82 | 85 | 90 | |-----------|----|----|----|----|----|----|----| | Sales ($) | 150| 180| 200| 240| 300| 330| 400|
c) Write the equation: ___________________ ___________________ Find a set of real-world bivariate data
b) Use two points from your line of best fit to find the slope. Show your work.