College Algebra CLEP Prep Practice Exam

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Gear up for success on the College Algebra CLEP exam with our comprehensive Prep Practice Exam! Whether you're a math whiz or need a little extra support, our resources are here to help you excel and earn college credit.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following pairs of lines are perpendicular?

y = 2x and y = -1/2x
y = -2x and y = 2x
y = 1/2x and y = -2x
y = 2x and y = 4x

The correct answer is: y = 1/2x and y = -2x

Perpendicular lines have slopes that are negative reciprocals of each other. In options A and B, the slopes are the same, therefore they cannot be perpendicular. In option D, the slopes are both positive, so they also cannot be perpendicular. The correct answer, option C, has a slope of -2 for the first line and a slope of 1/2 for the second line, which are indeed negative reciprocals and meet the criteria for perpendicular lines.