Finding Slope from Two Points

What is the formula for calculating the slope between two points?

• m = (y1 - y2) / (x1 - x2)

• m = (x2 - x1) / (y2 - y1)

• m = (x1 - x2) / (y1 - y2)

• m = (y2 - y1) / (x2 - x1)

What is the general process to find the slope between two points?

• Use a calculator for direct computation.

• Calculate the average of x and y values.

• Draw a graph and measure the line.

• Label the points, substitute into the formula, and simplify.

In the first example, what is the slope between the points (2, -1) and (7, -1)?

• 0

• 1

• -1

• Undefined

What does a slope of 0 indicate about the line?

• The line is falling.

• The line is vertical.

• The line is horizontal.

• The line is rising.

In the second example, why is the slope undefined?

• The formula was applied incorrectly.

• The points are identical.

• The numerator is 0.

• The denominator is 0.

What is the slope between the points (3, 4) and (3, 6)?

• 0

• 2

• -2

• Undefined

What is the slope between the points (2, 2) and (-5, 4)?

• -2

• 2/7

• -2/7

• 2

What does a negative slope indicate about the direction of the line?

• The line is rising from left to right.

• The line is vertical.

• The line is falling from left to right.

• The line is horizontal.

In the final example, what is the simplified form of the slope between the points (3, 9) and (-9, 3)?

• -1/2

• 1/2

• -2

• 2

How do you simplify the slope calculation when both numerator and denominator are negative?

• None of the above.

• Add the values instead of dividing.

• Multiply both by -1 and simplify.

• Divide both by the greatest common divisor.