Algebraic Relationships of Two Variables

According to the graph, how much money would you earn if you washed 8 cars?

• $25

• $80

• $50

• $40

A pizzeria charges $12 per pizza plus an additional $3 for delivery. Which equation represents the cost of having any number of pizzas delivered?

• c = 12p + 3

• c = 12p

• c = 3p

• c = 12 + 3p

Patrick earns $20 for every lawn that he mows. Write an equation used to find t, the total amount of money he earns from mowing n lawns.

• n = 20t

• t = 20n

• t = n + 20

• t = n - 20

Nancy can type 50 words per minute. Look at the table below to write an equation that matches the data.

• m=50 + w

• w= 50m

• w= 50 + m

• m= 50 - w

In this graph, the coordinate point (2,10) means which of the following?

• 2 km for every 10 minutes

• 10 km for every 2 minutes

• 10 km per minute

• (2,10) is not plotted on this graph

Which equation matches the table?

• y = 5x

• y = 5x + 1

• y = x + 5

• y = x + 1

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

The tables show the relationships between x and y for two data sets.

• Both data sets show additive relationships.  In Data Set I, y is 5 more than x, and in Data Set II, y is 6 more than x.

• Both data sets show multiplicative relationships.  In Data Set I, y is 3 times x, and in Data Set II, y is 5 times x.

• Data Set I shows an additive relationship in which y is 5 more than x.  Data Set II shows a multiplicative relationship in which y is 5 times x.

• Data Set I shows a multiplicative relationship in which y is 6 times x.  Data Set II shows an additive relationship in which y is 4 more than x. 

The table shows the relationship between x and y, where y is the dependent variable. Write an equation to represent the relationship in the table.Type the equation without spaces and lower case.

A tree in Dante’s neighborhood grew 9 inches each year.  Which graph best shows the relationship between the number of years and the height of the tree?

• A

• B

• C

• D