9
QuizMultiple Choice

Linear Functions — Quiz

Question 9 • Algebraic Reasoning

Which graph shows a linear function?

Answer
A
Image with description On a coordinate plane with x and y axes marked with negative 5 to 5, there is a curve drawn from quadrant 3 to quadrant 1. It passes through the point (negative 2 comma negative 2) and opens to the right side. It passes through the origin opening to the left side it passes through the point (2 comma 3)
B
Image with description On a coordinate plane with x and y axes marked with negative 5 to 5, there is a straight line of positive slope passing through ( negative 2 comma 5), (0 comma 3), (3 comma 0) and (5 comma negative 2)
C
Image with description On a coordinate plane with x and y axes marked with negative 5 to 5, two lines make a V shape. One line passes quadrant 2 through the point (negative 3 comma 3) and reaches the origin. The other line starts from the origin and passes quadrant 1 though the point (3 comma 3)
D
Image with description On a coordinate plane with x and y axes marked with negative 5 to 5, there is a parabola opening upwards with its vertex at the origin and passing through (negative 2 comma 2) and (2 comma 2).

Explanation

A linear function has a graph that is one straight line, so its rate of change is constant. Choice B shows a straight line through the listed points, such as (0, 3) and (3, 0). The other choices show a curve, a V shape, or a parabola, so they are not linear functions.

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