Given the data in Table A3, suppose family income decreases from $400 to $300 per week. Then the graph relating the price of strawberries (vertical axis) to the pur- chases of strawberries (horizontal axis) will

a. become negatively sloped.

b. become positively sloped.

c. shift rightward.

d. shift leftward.

e. no longer exist. TABLE A3 Weekly Family Price per Box of Number of Boxes Income Strawberries Purchased ($) (S) 300 $1.00 5 300 $1.25 3 300 $1.50 2 400 $1.00 7 400 $1.25 5 400 $1.50 4 per Week