During the winter, the amount of water that flows down a river remains at a low constant. In the spring, when the snow melts, the flow of water increases drastically, until it decreases to a steady rate in the summer. The flow then slowly decreases through the fall into the winter. Consider the graphs shown. А. Season (winter-fall) Season (winter-fall) Season (winter-fall) Season (winter-fall) 9. Which graph best represents the given situation? 10. Describe the other three graphs. 11. What are possible situations for graphs B, C, and D? Lesson 1 111 CHoughton Mifflin i Water (gallons per second) Water (gallons per second) B. Water (gallons per second) Water (gallons per second)

The graph shows information on four different variables for the countries of the world:  The percent of the population to have access to the Internet, the percent of the population to be over 65 years old, the percent of the population to live in a rural setting, and how developed the country is (on a scale of 1, 2, 3).  For each of the four variables, indicate whether it is categorical or quantitative, and describe how it is displayed in the graph.

2. The graph below tells the story of Kelii filling up her empty swimming pool with a hose at a constant rate. Create new graphs based on the changes described below. ster out at acon Water (gallons) Keli fils to his ice cream Time (minutes) rer feaonel a. After Kelii has been filling the pool for a few minutes, her friend decides to help her and puts a second hose in the pool. Water (gallons), Time (minutes) b. After Kelii has been filling the pool for a few minutes, the hose gets a hole in it so the water is coming out at a slower rate. Water (gallons) Time ter alons) Time (minutes) thet is enoug c. The pool started with some water in it. Water (gallons) Time (utes) Time (minutes)

3. Which graph represents a proportional relationship? Explain. Graph A Graph B Graph C ty fy Ay