Question

Melanie eats 1.5 pounds of cereal each week. Which model below best represents the number of pounds of cereal she eats in .5 weeks?

Answer 1

For this case, the first thing we must do is define a variable.
 We have then:
 x: number of weeks
 y: amount of cereal that Melanie eats
 We now write the function that models the problem:
 $y = 1.5x$
 Then, for 5 weeks we have:
 $y = 1.5 (5) y = 7.5 pounds$
 Answer:
 A model that best represents the number of pounds of cereal she eats is:
 $y = 1.5x$
 For 5 weeks we have:
 $y = 7.5 pounds$