Linear functions can represent both Carla and
Hours 1 2 3 4
arrish's lawn-mowing rates. Carla's lawn mowing
ates are represented by the equation y=9.5x + 15. Cost 22 34 46 58 70
Vhere x represents the number of hours she works
nd y represents the cost to her customers. Parrish's
awn-mowing rates are shown in the table. Who charges more per hour?
1. What is the constant rate of change that represents how much
Carla charges each hour?
2. What is the constant rate of change that represents how much
Parrish charges each hour?
3. What is the fixed cost that Carla charges?
4. What is the fixed cost that Parrish charges?
5. Who charges more per hour?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

How can you tell when x and y are not directly proportional?