Finding Slope two points and graphing lines (1/30)

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 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

Calculate the slope of the line through the points (2, 3) and (5, 7).

Back

m = (7 - 3) / (5 - 2) = 4/3.

Front

Calculate the slope of the line through the points (8, 3) and (8, 6).

Back

undefined (vertical line).

Front

What is the slope of the line that passes through the points (1, -2) and (-2, 7)?

Back

m = (7 - (-2)) / (-2 - 1) = 9 / -3 = -3.

Front

What is the slope of the line that passes through the points (5, 0) and (0, 5)?

Back

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

Front

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

Back

The line falls from left to right.

Front

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

Back

0.