Algebra EOC review

In baseball, a pitcher’s earned run average is used to measure how effective the pitcher is. The earned run average, A, is calculated using the formula shown, where E is the number of earned runs and N is the number of innings the pitcher pitched.

Which equation correctly solves the formula for the variable E?

• E = A / 9N

• E = AN / 9

• E = 9A / N

• E = 9AN

A function is shown. 7x + 4y = 14 Which graph represents the function?

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An inequality is shown. 4x + 5y ≥ 10 Which graph represents the solution set of the inequality?

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A compound inequality is shown. 2x - 1 ≤ 3 or (1/2)x + 4 > 7 Which graph represents the solution set of the compound inequality?

• graph A

• graph B

• graph C

• graph D

An inequality is shown. -3x + 7 ≥ -x - 5 What is the solution set for x?

• {x | x ≤ 6}

• {x | x ≥ 6}

• {x | x ≤ -6}

• {x | x ≥ -6}

A system of equations is shown. y = 2x + 2 2x + 5y = 19 What is the solution to the system?

• (3/4, 3 1/2)

• (1 1/8, 4 1/4)

• (1 2/3, 5 1/3)

• (3 1/4, 2 1/2)

A scatter plot of the U.S. national debt from 2001 to 2016, including a linear equation and its residuals modeling the data, is shown. Which statement correctly interprets the scatter plot?

• The scatter plot shows a weak positive correlation.

• The scatter plot shows a weak negative correlation.

• The scatter plot shows a strong positive correlation.

• The scatter plot shows a strong negative correlation.

An equation is shown. 3x² - 21 = 222

What is one exact solution to the equation?