ASVAB Practice Test

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Prepare for your ASVAB Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Practice this question and more.

Graphs of the following equations are straight lines except?

y = 2x + 3
y = -x + 4
y = 0.5x
y = x^2 + 3

The correct answer is: y = 2x + 3

Straight lines have a constant slope (or rate of change), meaning every increase in x or y value results in the same increase or decrease in the other value. Options B and C meet this criteria and are therefore straight lines. Option D is a quadratic equation and represents a curved line. Option A represents a linear equation, but does not have a constant slope as the coefficient of x is 2, meaning every increase in x results in a greater increase in y. Therefore, option A is the only equation that does not have a straight line graph.