Understanding the Slope of a Line

What symbol is commonly used to represent the slope of a line?

• N

• S

• L

• M

How is the slope of a line defined?

• The difference between x and y values

• The change in y divided by the change in x

• The product of x and y values

• The sum of x and y values

When calculating slope, why is it important to subtract in the same direction?

• To make calculations easier

• To avoid getting the wrong sign for the slope

• To ensure the slope is positive

• To ensure the slope is negative

What happens to the slope of a line that goes up from left to right?

• It is undefined

• It is negative

• It is positive

• It is zero

What is the slope of a line that decreases from left to right?

• Zero

• Undefined

• Negative

• Positive

What is the slope of a horizontal line?

• Positive

• Undefined

• Negative

• Zero

Why is the slope of a vertical line considered undefined?

• Because the x-values are constant

• Because the numerator in the slope formula is zero

• Because the y-values are constant

• Because the denominator in the slope formula is zero

If a line has a slope of 0, what type of line is it?

• Vertical

• Horizontal

• Diagonal

• Undefined

If two lines are parallel, what can be said about their slopes?

• They are undefined

• They are both zero

• They are equal

• They are negative reciprocals

What is the relationship between the slopes of two perpendicular lines?

• They are both zero

• They are equal

• They are both positive

• They are negative reciprocals