Which is a linear graph, and which is a nonlinear graph? How do you know?
Orange is linear; blue is nonlinear
Blue is linear; orange is nonlinear
Both are linear
Both are nonlinear

Blue is linear

Step-by-step explanation:

For lines to be linear on a graph, they have to follow these 2 rules:

-be a straight line

-be written in the form of y=mx+b

Therefore, blue is linear and orange is nonlinear

it would be:

c.parallelogram.