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.

What is the vertex of the parabola y = -2x^2 + 8x + 4?

(-2, 4)
(2, 4)
(2, -4)
(-2, -4)

The correct answer is: (2, 4)

The vertex of a parabola is the highest or lowest point on the graph, where the parabola changes direction. In this case, the parabola opens downwards, so the vertex is the highest point on the graph. The x-coordinate of the vertex can be found by using the formula x = -b/2a, where a and b are the coefficients of the quadratic equation. In y = -2x^2 + 8x + 4, a = -2 and b = 8, so the x-coordinate of the vertex is x = -8 / (2 * -2) = 2. To find the y-coordinate, substitute the x-coordinate into the original equation. y = -2(2)^2 + 8(2) + 4 = 4. Therefore, the vertex is (2, 4) and option B is