Determining undefined slope between two points

The video tutorial explains how to determine the slope between two points, especially when the X coordinates are the same. It highlights the importance of understanding that no horizontal change results in a vertical line, leading to an undefined slope. The tutorial applies the slope formula to demonstrate this concept, showing that a zero in the denominator indicates an undefined slope. The video concludes by reinforcing the idea that unchanged X values create a vertical line with an undefined slope.

What happens to the slope when the X coordinates of two points are the same?

• The slope is positive.

• The slope is negative.

• The slope is zero or undefined.

• The slope is always zero.

When applying the slope formula, what does a zero in the denominator indicate?

• The slope is zero.

• The slope is negative.

• The slope is undefined.

• The slope is positive.

How do you label the coordinates when using the slope formula?

• A1, B1 and A2, B2

• P1, Q1 and P2, Q2

• X1, Y1 and X2, Y2

• M1, N1 and M2, N2

What type of line is formed when the X values of two points are the same?

• Vertical line

• Curved line

• Diagonal line

• Horizontal line

What is the characteristic of a vertical line in terms of slope?

• It has an undefined slope.

• It has a zero slope.

• It has a negative slope.

• It has a positive slope.