Algebra 2 SOL Retake Prep 1

Tags

CCSS.HSF.IF.A.1

Tags

CCSS.HSF-BF.B.4A

Which is f ^-1(x)?

• f ^-1(x) = 3x + 5

• f ^-1(x) = 3x - 5

• f ^-1(x) = 3x - 15

• f ^-1(x) = 3x + 15

Tags

CCSS.HSF-BF.B.4A

Which of the following best describes the graph?

• They are both functions, but not inverse functions.

• They are reflected over y=x, but they are not both functions.

• They are not reflected over y=x, and they are not both functions.

• They are inverse functions.

Tags

CCSS.HSF-BF.B.4B

Data representing the grades of all the students on a recent test in Ann’s class have a normal distribution. The z-score of Ann’s test grade is 0.75. Explain what this z-score represents in relation to the mean of the class grades:

• Ann's score was above the mean

• Ann's score was below the mean

• Ann scored exactly equal to the mean

Jose’s teacher announces that the scores on their most recent Algebra test were normally distributed. The mean score was 72 and the standard deviation was 8. When Jose receives his score, he earned a 75. What percentage of students scored lower than Jose?

• 64.6% of students scored lower than Jose

• 35.3% of students scored lower than Jose

• 14.6% of students scored lower than Jose

• 85.4% of students scored lower than Jose

Find the probability that a student scored between an 80 and 85 on the test.

• 0.655

• 65.5%

• 60.1%

• 0.601

Approximately how many students scored an 81 or above?

• 50%

• 25,000 students

• 50 students

• 10,000 students

Approximately how many students scores would have a z-score of -0.5 and below?

• 15,427 students

• 25,000 students

• Cannot be determined

• 34,573 students

The number of miles a member of the track team runs each week is normally distributed. If the mean is 6 miles, and the standard deviation is 1.5 miles, find the z-score of a runner who ran exactly 7 miles.

• z = 0.67

• z = -0.67

• z = 1.5

• z = 0.5