Unit 7 STAAR Review

Unit 7: Functional Relationships

Multiple Choice

Multiple Choice

A relationship ​is proportional if there is a constant rate of change between x and y.

Multiple Choice

• The graph shows a non-proportional relationship because it has a negative slope.

• The graph shows a non-proportional relationship because the graph does not contain the origin.

• The graph shows a non-proportional relationship because the x and y intercepts both contain 7.

• The graph shows a non-proportional relationship because the graph passes through 3 different quadrants.

Multiple Choice

Which situation could NOT represent a proportional relationship?

• The number of gallons of water in x barrels with 42 gallons of water in each barrel.

• The amount an employee who makes $8.50 per hour earns in h hours.

• The weight in x weeks of a puppy that gains 2 pounds per week if its starting weight is 8 pounds.

• The cost of purchasing p pounds of bananas for $.55 per pound.

Direct Variation

Multiple Choice

• $41.52

• $153.86

• $75.67

• $108.96

• If the solution for a system of equations is (4,-9) What value of x satisfies the equation?

• If the solution for a system of equations is (-7,-2) What value of y satisfies the equation?

Fill in the Blank

What is the x-coordinate of the ordered pair that best represents a solution to both equations?