The regression equation give for the first question is y=-84.4 + .91x
Answer:
Kindly check explanation
Explanation:
Given the regression equation y=-84.4 + .91x
Homework score (independent variable) = x
Midterm score (predicted variable) = y
If Homework score (x) = 420
y = - 84.4 + 0.91(420)
y = - 84.4 + 382.2
y = 297.8
= 298 ( nearest integer)
B.) Given the regression equation :
ŷ = 85 + 16x
The correlation between amount of gas and degree days is greater than 0, the Coefficient 16 represents the gradient, that is change in y per change in x. Since the value is positive, it depicts a positive correlation( greater than zero).