College Math CLEP Prep Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Unlock your mathematical potential and conquer the College Math CLEP exam with ease! Introducing our powerful College Math CLEP Prep Practice Exam, your ultimate tool for exam readiness.

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.

What is the equation of the line that passes through (3,9) and is perpendicular to the line 4x + y = 8?

4x + y = 9
y = -4x + 9
y = 4x + 9
y = -4x - 9

The correct answer is: y = -4x - 9

A is incorrect because it is the equation of a parallel line, not a perpendicular line. The slope of the given line is -4 and the perpendicular line's slope should be the negative reciprocal, which is 1/4. Therefore, the correct equation would not have the same slope as the given line. B and C are both incorrect because they have the same slope as the given line, and as stated before, the perpendicular line's slope should be the negative reciprocal. The correct equation is D because the given point (3,9) satisfies the equation when substituted. Additionally, the slope (-4) multiplied by the slope of the perpendicular line (1/4) gives a product of -1, as it should for two perpendicular lines.