BNB pb. 191-192 Lesson 4-8 Dependent and Independent Variable

The population of specific states, according to the US world population, is shown below. Order the state representatives from least to greatest.

North Carolina: 11,210,900

Ohio: 11,924,600

Louisiana: 4,607,410

Wyoming: 590,169

California: 39,663,800

Identify the independent variable and the dependent variable.

The miles, m an automobile travels and the millimeters of tread, t, the tire loses.

The independent variable is​ (a)   , the number of​ (b)  

The dependent variable is ​ (c)   , the number of​ (d)  

Identify the independent variable and the dependent variable.

The number of tablet computers sold, t, and the dollar amount of sales, s.

The independent variable is ​ (a)   the​ (b)  

The dependent variable is ​ (c)   the​ (d)  

Error Analysis: You spend c dollars for p identical puppets. A friend claims that since c increases if you increase p, and p increases if you increase c, either c or p could be the independent variable. Which is the independent variable? Why is your friend incorrect?

Part A: The independent variable is​ (a)   .

Part B: Why is the friend incorrect?

The friend is incorrect because​ ​ (b)   forces the ​ (c)   . Increasing the​ (d)   does not necessarily relate to how many puppets you buy.

Dana said that speed, s could be either an independent or dependent variable. Choose a situation where speed, s is an independent variable.

Dana said that speed, s could be either an independent or dependent variable.

Choose a situation where speed, s is a dependent variable.

After-school practice is 90 minutes long. Some of that time is spent doing warm-ups and the rest is spent doing drills.

What are the related and unknown quantities?

If you buy 5 apples how many pears did you buy?

Which is the dependent variable?

The amount of growth depends on the amount of water.

If the number of apples and the number of pears must equal 12, what is the equation when a represents the number of apples and p represents the number of pears?