Analyzing Two Variable Relationships

Identify the independent variable.

Lana practices cello for 15 minutes each day. How many minutes does she practice in 3 days?

• number of minutes

• number of days

• 45 days

• practicing cello

What is the dependent variable?

Lana practices the cello for 15 minutes each day. How many minutes does she practice in 3 days?

• number of days

• 45 minutes

• number of minutes

• practicing cello

What is the independent variable?

The equation y=16x represents the number of sit ups Adam will do in "x" sets. How many sit ups does Adam do in 4 sets?

• numbers of sit ups

• 16

• number of sets

• y=16x

What is the dependent variable?

The equation y=16x represents the number of sit ups Adam will do in "x" sets. How many sit ups does Adam do in 4 sets?

• number of sets

• number of sit ups

• Adam

• 64

Answer the question:

The equation y=16x represents the number of sit ups Adam will do in "x" sets. How many sit ups does Adam do in 4 sets?

• 4

• 20

• 48

• 64

Identify the independent and dependent variables from the table.

• Independent - gallons

  Dependent - cost

• Independent - cost

  Dependent - gallons

• Independent - gallons

  Dependent - $4.50

The cost of downloading one song from a website is $0.99.
Which equation can be used to find t, the cost in dollars of downloading n songs?

• t = 0.99n
• t = n + 0.99
• n = 0.99t

Gourmet chocolate costs $5.25 per pound. Which equation best represents y, the total cost of x pounds of chocolate?

• x = 5.25y

• y = 5.25 + x

• y = 5.25x

• x = 5.25 +y

Mrs. Khan makes cookies for the school bake sale. She uses the equation c = 0.75x to determine the cost, c for x cookies. which best represents the constant rate at which cookies are sold at the bake sale?

• 75 cookies per dollar

• $1.50 per cookie

• 1.5 cookies per dollar

• $0.75 per cookie

The table shows the ounces of water,y, need to for x number of servings.

Based on the information in the table, which equation can be used to model the relationship between x and y?

• y = 2x

• y = x + 2

• y = 18x

• y = x + 18