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 (10, 1) and (5, 2).

Back

-1/5

Front

Find the slope of the line that passes through (−6, 2) and (0, 4).

Back

1/3

Front

Find the slope of the line that passes through (−9, 9) and (−2, −6).

Back

-15/7

Front

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

Back

The line is horizontal.

Front

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

Back

The line is vertical.

Front

When you have a slope with a zero in the denominator, what is the slope?

Back

Undefined

Front

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined

Front

If a line rises from left to right, what is the sign of its slope?

Back

Positive