1. ## is/are true about lines

which of the following statements is/are true?

A. the graph of a linear function is a straight line.
B. a straight line is the graph of a linear function.
C. the slope of a horizontal line is undefined.

2. Originally Posted by Alexander
which of the following statements is/are true?

A. the graph of a linear function is a straight line.
True.
B. a straight line is the graph of a linear function.
False. Consider $x=4$.
C. the slope of a horizontal line is undefined.
False. The slope of a vertical line is undefined.