20 ! ! which statement is true about the graphs shown? a) only graph a represents a proportional relationship. b) only graph b represents a proportional relationship. c) graph a and graph b both represent a proportional relationship. d) graph a and graph b both represent a non-proportional relationship.

Option  A) Only graph A represents a proportional relationship

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

therefore

Graph A represent a proportional relationship, because the line passes through the origin

irrational, cannot