Slope from two points

Front

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

Back

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

Front

What does a slope of 0 indicate about a line?

Back

The line is horizontal.

Front

What does an undefined slope indicate about a line?

Back

The line is vertical.

Front

If the slope of a line is positive, what does that tell you about the line's direction?

Back

The line rises from left to right.

Front

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

Back

The line falls from left to right.

Front

Calculate the slope of the line that passes through the points (2, 3) and (4, 7).

Back

m = (7 - 3) / (4 - 2) = 2.

Front

Calculate the slope of the line that passes through the points (1, 2) and (1, 5).

Back

The slope is undefined.

Front

Calculate the slope of the line that passes through the points (3, 4) and (6, 4).

Back

m = (4 - 4) / (6 - 3) = 0.

Front

What is the slope of a line that passes through the points (5, 1) and (5, 3)?

Back

The slope is undefined.

Front

What is the slope of a line that passes through the points (-1, -1) and (2, 2)?

Back

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