8th Grade STAAR Benchmark 22-23

A triangle has vertices at (1,1), (1,2) and (3,2). It is dilated by the rule (x,y) --> (rx,ry) to create the new vertices at (3,3), (3,6), and (9,6).

What is the rule? Numerical answer only!

Stella walks directly from B to C. How far does she walk?

A teacher recordered the scores of a group of her students.

40, 42, 44, 45, 46, 48, 50

What is the mean absolute deviation of the data

Round to the hundredth place. Numeric answer only.

Four triangles are shown. One side of each triangle lies on a ray, and the triangles are not drawn to scale. Based on these triangles, which statement about x is true?

Mr. Jenkins deposited $1,250 into an account. He made no additional deposits or withdrawals. Mr. Jenkins earned 4.25% annual simple interest on the money in the account.

What was the balance in dollars and cents in Mr. Jenkin's account at the end of 4 years?

Numeric only no symbols.

If (x,y) --> (ax, ay), for what value of "a" would the point R' of the resulting image have an x-value of 9?

Oscar buys his lunch in the school cafeteria. The cost of 15 school lunches is $33.75.Make a graph that has a slope that best represents the average cost of the lunches in dollars per lunch?

A list of numbers ordered from least value to greatest value are shown. Two numbers are missing.

Which TWO numbers could be the missing number?

Which table contains only corresponding x-values and y-values where the value of y is 3 more than the quotient of x and 2?

What is the solution to this equation?

Which representations show y as a function of x? Select two.

The graph shows the relationship between the number of gallons of fuel remaining in the tank of a semi truck and the number of miles traveled by the semi truck.

Which function can be used to find y, the number of gallons of fuel remaining in the tank of the semi truck after it has traveled x miles?

The measures of two angles are (5x + 24) and (9x - 17). What is the value of x if these angles are congruent?

Which function is best represented by this graph?

The dimensions of a rectangular piece of paper are 8.5 inches and 11 inches. Veronica folded the piece of paper along its diagonal. Which measurement is closest to the length of the diagonal in inches.

Veronica is ordering trophies for her school. Company P charges $3.50 for each trophy and a one-time engraving fee of $25. Company R charges $7.50 for each trophy and a one-time engraving fee of $17. Which inequality can be used to find x, the minimum number of trophies that can be ordered so that the total charge at Company P is less than the total charge at Company R?

An employee put $5,000 in a retirement account that offers 9% interest compounded annually. The employee makes no additional deposits or withdrawals. Which amount is closest to the interest the employee will have earned at the end of 5 years?

Triangles PQR and RST are similar right triangles.

Which proportion can be used to show that the slope of line PR is equal to the slope of line RT?

An oil well contractor drills a shaft 6 meters deeper into the ground every 3 hours. Graph the equation that has a slope that best represents this rate.

The scatterplot shows the time spent playing a video game and the number of points scored by several students.

Based on the scatterplot, which is the best prediction of the number of points scored by students who spend 45 minutes playing the video game?

Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spend playing video games on Saturday. He recorded the data in the scatterplot.

Based on the scatterplot, what is the best prediction of the number of hours one of Phil's friends spends sleeping when the friend spends 1 hour playing video games?

Which transformation does not preserve congruency? Choose 2

Triangle ABC was transformed to create triangle A'B'C'.

Which rule best describes this transformation?

Triangle HJK is graphed on the coordinate grid. Triangle HJK will be transformed using the rule (x, y) ---> (-x, y) to create triangle H'J'K'.

Which triangle represents triangle H'J'K' ?

In each diagram, line g is parallel to line k, and line t intersects lines g and k.

Based on the diagrams, which statement about x is true?