SAT Math Multiple Choice Question 355: Answer and Explanation

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Test Information

Question: 355

10.

The solution to which inequality is represented in the graph above?

  • A.
  • B.
  • C.
  • D.

Correct Answer: A

Explanation:

A

Difficulty: Medium

Category: Heart of Algebra / Inequalities

Strategic Advice: Don't answer this question too quickly. The shading is below the line, but that does not necessarily mean that the symbol in the equation will be the less than symbol (<).

Getting to the Answer: Start by writing the equation of the dashed line shown in the graph in slope-intercept form. Then use the shading to determine the correct inequality symbol. The slope of the line shown in the graph is and the y-intercept is -3, so the equation of the dashed line is . The graph is shaded below the boundary line, so use the < symbol. When written in slope-intercept form, the inequality is . The inequalities in the answer choices are given in standard form (Ax + By = C), so rewrite your answer in this form. Don't forget to reverse the inequality symbol if you multiply or divide by a negative number.

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