In answering the question, assume a graph in which dollars are measured on the vertical axis and output on the horizontal axis.For a purely competitive firm, marginal revenue graphs as a

A) straight, upsloping line.
B) straight line, parallel to the vertical axis.
C) straight line, parallel to the horizontal axis.
D) straight, downsloping line.

Marginal Revenue

The boost in revenue experienced by a company when it sells an extra unit of its goods or services.

Purely Competitive Firm

A company that operates in a market where there are many sellers and buyers, the products are homogeneous, and there is free entry and exit from the market.

Vertical Axis

The y-axis in a graph, which typically shows the range of values for the variable measured.