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Question 109

Which graph shape always represents a direct proportion between x and y?

  1. A straight line through the originCorrect answer
  2. A curved line beginning at the origin
  3. Any increasing straight line
  4. A horizontal line above the origin

Explanation

A direct proportion has the form y equals a constant times x, so its graph is a straight line that passes through zero on both axes. A straight line with a nonzero intercept is the closest distractor because it has a constant rate of change but includes a fixed starting amount.

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Question 109: Which graph shape always represents a direct proportion… · Ratios and Proportions · Questena