10f 2 7 Graphing Worksheet (20 Points Possible) Part A: THE CASE OF THE RADIOACTIVE RAT Directions: A radioactive rat has escaped from the mad scientist's lab. It is crucial that the rat be found and returned to its cage. A lab assistant has found a similar looking rat scurrying around the lab after dark. Could this be the missing radioactive rat? Use the scatter plot graph below to determine if the rat found scurrying around the lab could be the missing radioactive rat. 1. 2 points |dentify the: AGE OF RAT VS WEIGHT OF RAT Independent Variable: Age of the rat (in weeks) Dependent Variable: ;... of the rat (in grams) .--..'-- 2. 3 points Draw a trend line on this graph -.."--- to show the overall trend of the data. (Use g insert > shapes) e LT, a AT ] [ AT I T g T 23 4 & 8 F 8 AGE OF RAT (WEEKS) its mass also tends to increase. MASS OF RAT (grams) . 2 points What relationship exists between the age of a rat and its mass? As the age of the rat increases, 4. 2 points The rat found scurrying around the lab has a mass of 150 grams. Using the trend line you drew on this graph, what is the approximate age of this rat (in weeks)? g around 4 weeks old 5. 3 points The missing radioactive rat is 8 weeks old. Could the rat found scurrying around the lab (mass = 150 grams) be the missing radioactive rat? How do you know? Is this the rat\" nO How do you know? The missing radioactive rat is 8 weeks old, but the rat found has a mass of 150 grams, which corresponds to an approximate age of 4 weeks. Therefore, the ages do not match. Part B. Identify the independent and dependent variable in each experiment. Hint: If you're having trouble identifying the independent and dependent variable, here are a few ways to tell them apart. First, remember the dependent variable depends on the independent variable. It helps to write out the variables as an if-then or cause-and-effect sentence that shows the independent variable causes an effect on the dependent variable. If you mix up the variables, the sentence won't make sense. Example: If you change the color of light (independent variable), then it affects plant growth (dependent variable). Switching the variables makes no sense: Example: If plant growth rate changes, then it affects the color of light. 6. 2 points A sports medicine researcher has been hired by Delicious Drinks Company to test the effects of its sports drink on athletic performance. The company wants to claim that when an athlete consumes the sports drink, their performance will improve. Independent Variable: Dependent Variable: 7. 2 points Bigger Burger restaurant chain wants to know if the color of the interior of their restaurants will affect how fast people eat. (Of course, they would prefer that consumers enter and exit quickly to increase sales volume and profit!) Independent Variable: Dependent Variable: 8. 2 points Professor Garcia is doing a study to see if the amount of television a person watches is related to their age. Independent Variable: Dependent Variable: 9. 2 points Password (to show your CC attendance)