STAAR Practice

Which graph best represents a quadratic function that has two zeros?

• Graph A

• Graph B

• Graph C

• Graph D

• The annual interest rate of the savings account

• The initial balance of the savings account

• The balance of the savings account at the end of the first year

• The number of years the savings account will earn interest

The graphs show the number of stamps in two stamp collections over a period of time. What is the system of equations represented by the two graphs? Move the correct answer to each box. Not all answers will be used.

System of Equations:

​ ​ (a)   ​(this equation has y-intercept of 2)

​ (b)   (this equation has y-intercept of 4)

A student saved the same amount of money each week for a vacation. The graph represents the number of weeks the student has saved money and the amount of money in dollars the student still needs to save for the vacation. Which statement best describes the x-intercept of the graph?

• The student saved $125.00 in 4 weeks for the vacation

• The student saved $500.00 for the vacation

• The student saved $31.25 each week for the vacation

• The student saved enough money for the vacation in 16 weeks.

• {5, 12}

• {-12, -5}

• {-3, 20}

• {-20, 3}

The value of y varies directly with x. When x = 14, y = 35. What is the value of y when x = 16?

• 37

• 64

• 40

• 37.5

• dotted
• solid
• shade above
• shade below
• (0,3)
• down 2 right 5
• up 2 right 5
• down 2 left 5
• up 3 right 1

A student sold candy bars and bags of popcorn for a school fundraiser.

The student sold a total of 240 candy bars and bags of popcorn.

The price of each candy bar was $1, and the price of each bag of popcorn was $2.

The student sold $300 worth of candy bars and bags of popcorn.

How many candy bars did this student sell for the school fundraiser?

• 80

• 180

• 60

• 120