2019 Keystone Algebra I Module 2 Sampler

A graph of a relation is shown.

Removing which line segment from the graph would make the relation a function of x?

• the line segment with endpoints (-4, -2) and (-3, 2)

• the line segment with endpoints (-3, 2) and (3, 3)

• the line segment with endpoints (3, 3) and (4, -3)

• the line segment with endpoints (4, -3) and (-4, -2)

The set of ordered pairs below is a relation.

{(0.5, 2), (1.5, 5), (4.0, 12), (6.5, 15)}

Which relation has the same domain as the given relation?

• {(1, 5), (2, 2), (ˉ3, 15), (ˉ8, 12)}

• {(0.5, 1), (1.5, 4), (4.0, 11), (6.5, 14)}

• {(2, 1.1), (5, 2.2), (12, 3.3), (15, 4.4)}

• {(ˉ1, 6.5), (ˉ3, 1.5), (ˉ6, 4.0), (ˉ10, 0.5)}

A teacher buys some pencils.

• He buys 2 pencils for each of his students.

• He buys 10 additional pencils.

• Each pencil costs $0.10.

Which equation describes the total amount of money (y), in dollars, that the teacher spends on pencils as a function of the number of students (x) he has?

The table below represents a function of x.

Which equation describes the function?

Bari paid a total of $62 for 3 hours of driving lessons. This included a $20 fee for the driver’s manual and an hourly rate for use of the car. What is the hourly rate Bari paid?

• $14

• $20

• $21

• $27

The graph shown represents a linear function.

Which equation describes the linear function?

Martha earns money sewing curtains. She charges a flat fee to meet with a customer and take window measurements and an hourly rate to sew the curtains. The graph below shows the relationship between the time, in hours, Martha works on a sewing project and the total amount, in dollars, she charges.

What is the hourly rate that Martha charges for sewing curtains?

• $10.00

• $12.50

• $15.00

• $20.00

The scatter plot below shows the relationship between the number of video files (x) stored on a computer and the number of gigabytes (y) of storage space available on the computer.

Based on the scatter plot, which equation represents a line of best fit that could be used to predict the number of gigabytes of storage space available on the computer based on the number of video files that could be stored on the computer?

• y = -14x + 250

• y = -9x + 116

• y = -8x + 227

• y = -4x + 189

A data set shows a basketball team’s final scores for one season. Some information about the scores in the data set is listed below.

• The minimum value is 42.

• The lower quartile value is 54.

• The median is 60.

• The upper quartile value is 72.

• The maximum value is 90.

Of the team’s final scores for the season, 75% of them are most likely between which two values?

• 42 and 66

• 42 and 72

• 60 and 72

• 72 and 90

The owner of an ice-cream stand conducts a random survey of 50 people to determine which ice-cream flavor customers prefer to buy. The bar graph below shows the results of the survey.

The ice-cream stand is expected to serve 350 customers on the first day of summer. Based on the results of the survey, which value is most likely the number of customers who will buy an ice-cream flavor other than chocolate on the first day of summer?

• 56

• 126

• 168

• 224