College Algebra CLEP Prep Practice Exam

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Prepare for the College Algebra CLEP Test with our comprehensive practice exam. Study with flashcards and multiple choice questions, each offering clues and detailed explanations. Achieve your best score and excel in your exam!

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What is the equation of the axis of symmetry of the parabola y = 2x2 + 4x - 5?

x = -2
x = -1
x = 0
x = 1

The correct answer is: x = -2

The axis of symmetry of a parabola is a vertical line that divides the parabola into two symmetric halves. In order to find the equation of the axis of symmetry, we need to use the formula x = -b/2a, where a and b are the coefficients of the quadratic equation in the form of ax^2 + bx + c. In this given equation, a = 2 and b = 4. Plugging these values into the formula, we get x = -4/4 = -1. This means that the axis of symmetry is a vertical line passing through x = -1, which is the answer A. As for the other options, they are incorrect because they do not correspond to the formula x = -b/2a. Option B is the y-intercept of the parabola and does not represent the equation of the axis of symmetry