True or false: slope

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   The slope of a horizontal line is zero.

2. Statement is true

   Yes

   Statement

   The slope of a vertical line is undefined.

3. Statement is true

   No

   Statement

   The slope of a vertical line is zero.

4. Statement is true

   Yes

   Statement

   If a line makes angle α with the x-axis, its slope is tan α.

5. Statement is true

   Yes

   Statement

   That formula fails when α is 90 degrees.

Explanation