Finding slope given two points

Front

What is the formula to find the slope (m) between two points (x1, y1) and (x2, y2)?

Back

m = (y2 - y1) / (x2 - x1)

Front

What does it mean if the slope of a line is 0?

Back

The line is horizontal.

Front

What does it mean if the slope of a line is undefined?

Back

The line is vertical.

Front

Find the slope of the line that passes through the points (1, 2) and (3, 6).

Back

m = (6 - 2) / (3 - 1) = 4 / 2 = 2

Front

Find the slope of the line that passes through the points (4, 5) and (4, 1).

Back

Undefined (vertical line).

Front

If the slope of a line is negative, what does that indicate about the line's direction?

Back

The line descends from left to right.

Front

Find the slope of the line that passes through the points (0, 0) and (5, 5).

Back

m = (5 - 0) / (5 - 0) = 1

Front

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined

Front

Find the slope of the line that passes through the points (-1, -1) and (2, 2).

Back

m = (2 - (-1)) / (2 - (-1)) = 3 / 3 = 1