Linear Relationships and Functions

Which of these tables represent a function?

• A

• B

• C

• D

Is (1, 2) a solution to the linear equation 2x + 5y = 12?

• Yes

• No

Select all of the points that are solutions to the linear equation 5x + 8y = 40.

• (8, 0)

• (4, 2)

• (0,5)

• (1, 6)

Given the equation 3x + 13y = 39 and x = 1, what is the value of y?

• 2

• 35/2

• 36/13

• 3

Using the table above, determine which statement is correct.

• The table is proportional and the unit rate is 100.

• The table is not proportional because the unit rate is not constant.

• The table is not proportional because it doesn't pass through the origin.

• The table is proportional and the unit rate is 0.01.

Determine which equation does NOT represent a proportional relationship.

• y = -2x

• y = 1/2 x

• y = 3x

• y = 5x - 7

Using the table above, determine the equation of the line.

• y = 5x

• y = 10x

• y = 1/5 x

• y = 1/10 x

The table shows the weight in pounds of objects on earth compared to objects on the moon.  If an object on earth weighs 42 lbs, what is its weight on the moon?

• 7 lbs

• 12 lbs

• 84 lbs

• 252 lbs

The graph above shows the price of games in dollars.  Is the graph proportional and how do you know?

• The graph is proportional  because it is linear.

• The graph is proportional because it is linear and passes through the origin.

• The graph is not proportional because it does not pass through the origin.

• The graph is not proportional because it is not linear and it does not pass through the origin.

Sherry can buy 4 pounds of oranges for $18.  Write the equation to represent the cost, y, for x oranges.

• y = 4.5x

• y = 72x

• y = 2/9 x

• y = 4x