All Kinds of Slope

Front

What is the equation of a vertical line?

Back

x = a, where 'a' is a constant.

Front

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined

Front

How do you calculate the slope between two points (x1, y1) and (x2, y2)?

Back

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

Front

What type of slope does a line that rises from left to right have?

Back

Positive slope.

Front

What type of slope does a line that falls from left to right have?

Back

Negative slope.

Front

What is the slope of a line that is perfectly horizontal?

Back

0.

Front

What is the slope of a line that is perfectly vertical?

Back

Undefined.

Front

If a line has a slope of 1/2, what does this indicate about the rise and run?

Back

For every 2 units of run, the line rises 1 unit.

Front

What does a slope of -1 indicate about the line?

Back

For every 1 unit of run, the line falls 1 unit.