The scatter plot at the right was created to show the length of a person's vacation and the weight of the suitcase they packed. Use the scatter plot to answer questions a - c.

a. write an equation in slop intercept form for the trend line shown on the scatter plot

b. use your equation to predict the weight of a suitcase for someone taking a 12-day trip

c. which is NOT a true statement about the scatter plot above?
i. the association of the scatter plot is positive
ii. the association of the scatter plot is linear
iii. for every additional day of a trip, the weight of a suitcase increases 5 pounds
iv. for every 5 additional days of a trip, the weight of a suitcase increases one pound.