Finding Slope

Front

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

Back

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

Front

Find the slope of the line that passes through the points (2, 4) and (6, 12).

Back

2

Front

Find the slope of the line that passes through the points (12, -2) and (4, -6).

Back

1/2

Front

What does a positive slope indicate about a line?

Back

A positive slope indicates that as x increases, y also increases.

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that as x increases, y decreases.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

If the slope of a line is -2, what does this tell you about the line's direction?

Back

The line descends from left to right.

Front

How do you determine if a slope is positive, negative, zero, or undefined from a graph?

Back

Positive slopes rise from left to right, negative slopes fall from left to right, zero slopes are horizontal, and undefined slopes are vertical.

Front

Find the slope of the line that passes through the points (0, -3) and (3, 0).

Back

Slope = 1