Finding Slope From Two Points

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 positive slope indicate about a line?

Back

A positive slope indicates that the line rises as it moves from left to right.

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that the line falls as it moves from left to right.

Front

What does a slope of zero mean?

Back

A slope of zero means the line is horizontal.

Front

What does an undefined slope mean?

Back

An undefined slope means the line is vertical.

Front

Given the points (1, 2) and (3, 6), what is the slope?

Back

m = (6 - 2) / (3 - 1) = 4 / 2 = 2

Front

Given the points (4, 5) and (4, 9), what is the slope?

Back

The slope is undefined because the x-coordinates are the same.

Front

If the slope of a line is 3, what does this mean in terms of rise over run?

Back

For every 3 units the line rises, it runs 1 unit to the right.

Front

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

Back

A positive slope rises, a negative slope falls, a zero slope is horizontal, and an undefined slope is vertical.

Front

What is the slope of the line that passes through the points (2, 3) and (2, -1)?

Back

The slope is undefined.