Answer:
Step-by-step explanation:
By using linear regression calculator,
Linear regression equation representing the data set will be,
y = 7.79x + 34.27
Correlation coefficient of the line will be,
R = 0.98
Since, correlation coefficient of the line is (+0.98), relation between the two variables is a strong linear relationship.
That means hours spent studying has the strong relation with test scores obtained.
B
b c d
56
80% is .8. Of means to multiply. So do .8 x 70 which comes out to 56.
I hope this helps! If you have anymore questions feel free to ask! :D
Answer:the first one
