#9.6 STAAR Review Quiz 2

What is the range of the part of the linear function shown?

The range is the set all real number (a)   and​ (b)  

• greater than or equal to -4
• less than 2
• greater than or equal to -3
• less than or equal to 2
• greater than 4
• greater than 3
• greater than 2

A customer is ordering hats and T-shirts from an online store. Each hat costs $5, and each T-shirt costs $12. The customer receives free shipping if the amount of the order is over $100. Write an inequality that represents all possible combinations of hats, x, and T-shirts, y, in an order that qualifies for free shipping.

Move the correct answer to each box. Not all answers will be used. ​

(a)   x + ​ ​ (b)   y​ (c)   ​ (d)  

• 5
• 12
• >
• 100
• <
• =
• 17

A quadratic function can be used to model the data in the table. Which value best estimates the miles per gallon when the speed is 75 miles per hour?

• 27.9

• 31.0

• 40.2

• 24.5

Researchers studied the population of a town over time and modeled the data using an exponential function.

The initial estimated population was 50,400. After the first year, the population of the town was 48,000.

If the population of the town continues to decrease at this rate each year, which function can be used to model the population x years after the researchers began their study?

• 2w + 1

• 2w - 1

• 4w - 3

• 4w + 3

• (5, -4)

• (-2, -5)

• (9, 1)

• (-8, 3)

• (1, -7)

What is the solution to this system of equations? 3x + 5y = 11 and x - y = -15

• (2, 27)

• (-2, 3)

• (2, 0)

• (-8, 7)