Lesson 2 Homework Practice Lines Of Best Fit 📍

b) Write the equation of your line: ___________________

b) Use two points from your line of best fit to find the slope. Show your work.

a) Draw a line of best fit through the data. lesson 2 homework practice lines of best fit

a) Is the correlation positive or negative? ___________________

e) Is it reasonable to use this line to predict sales at ? Why or why not? 5. Challenge – Interpret the Line A student drew a line of best fit for a scatter plot with the equation: [ y = -2.5x + 45 ] b) Write the equation of your line: ___________________

c) Predict the test score for a student who studies : ________ 2. Age of Car vs. Value A used car dealer records the age of cars (in years) and their selling price (in $1000s).

(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 ($). a) Is the correlation positive or negative

c) Predict the y-value when x = 10: ________

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)