Back to Fit a linear function to a scatter plot — Problem 3 · Task Set 8

Exercises: Fitting a Linear Function to a Scatter Plot

Work through each section in order. When a scatter plot is shown, first
decide whether it suggests a LINEAR association before fitting a line. To
find a line's equation, read two convenient points ON the line (not
necessarily data points), compute slope as rise over run, and find the
y-intercept. Remember: a line of fit balances points above and below and
need not pass through any data point.

Grade 9·22 problems·~35 min·Common Core Math - HS Statistics and Probability·standard·hss-id-b-6c
Work through problems with immediate feedback
A

Warm-Up: Slope, Lines, and Form

These problems review slope and line basics you already know.

1.

A fitted line has equation y=4x+9y = 4x + 9. Use it to predict yy when x=5x = 5.