Mathematics
Grade 12
45 min
Find the equation of a regression line
Tutorial Preview
1
Given summary stats, find the regression equation y = a + bx.
2
Interpret the slope in y = 10 + 2.5x for house prices.
3
Use y = 50 + 0.75x to predict a test score for 8 hours of study.
Sample Practice Questions
Easy
Find the regression equation given: mean(x)=10, mean(y)=30, SSxy=200, SSxx=100.
0.y=10+2x
1.y=2+10x
2.y=30+2x
3.y=10+5x
Easy
The equation for ice cream sales is y = 50 + 2x, where x is temperature. Interpret the slope.
0.2 sales/C
1.50 sales
2.52 sales
3.x sales
Easy
Use y = 20 + 5x to predict sales if advertising spending (x) is 10.
0.70
1.35
2.50
3.200
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing Free