Determining Sales

Table:
Sales Space
1.6 5
2.2 5
1.4 5
1.9 10
2.4 10
2.6 10
2.3 15
2.7 15
2.8 15
2.6 20
2.9 20
3.1 20

1. Find the y-intercept of the regression equation.
a) 0.074
b) 7.4
c) 1.45
2. In the above problem, if the square footage is increased by one foot, how much do you predict the sales to increase per week?
a) $1.45
b) 7.4 cents
c) $7.40
3. Predict the sales for a shelf space of 11.7 feet.
a) $231.58
b) $2.32
c) 23 cents
4. For the above problem, compute the standard error of estimate.
a) 0.949
b) 0.30805
c) 0.29372