### Home > GB8I > Chapter 2 Unit 2 > Lesson INT1: 2.1.4 > Problem 2-41

2-41.

Without graphing, calculate the slope of each line described below.

A line that goes through the points

and . Use a slope triangle or another method to determine the slope of the line.

Another method is to first subtract the

-values and the-values from each other.

Substitute the differences into the slope formula.

A line that goes through the origin and the point

. See part (a).

A vertical line (one that is “up and down”) that goes through the point

. Vertical lines have an undefined slope.

A line that goes through the points

and . See part (a).