Exploring Adding and Subtracting Rational Expressions

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

• The line is vertical.

• The line is moving downwards from left to right.

• The line is horizontal.

• The line is moving upwards from left to right.

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

• 1

• Undefined

• Negative

• 0

What is the slope of a line that is horizontal?

• Undefined

• 0

• -1

• 1

How is slope calculated using a graph?

• Rise over run

• Y2 minus Y1

• X2 minus X1

• Run over rise

What is the formula for calculating slope with ordered pairs?

• (y2 - y1) / (x2 - x1)

• (x1 - x2) / (y1 - y2)

• (x2 - x1) / (y2 - y1)

• (y1 - y2) / (x1 - x2)

When finding the slope using ordered pairs (2, -3) and (4, 1), what is the correct calculation?

• (1 + 3) / (4 - 2)

• (1 - (-3)) / (4 - 2)

• (4 - 2) / (1 - (-3))

• (-3 - 1) / (2 - 4)

What property do parallel lines share?

• Same slope

• Opposite slopes

• Undefined slope

• Zero slope

What are the slopes of perpendicular lines?

• Same slope

• Negative reciprocals of each other

• Sum to zero

• Both are undefined

If a line has a slope of 2/3, what is the slope of a line perpendicular to it?

• -2/3

• 3/2

• 2/3

• -3/2

How can you determine if two lines are parallel?

• Both slopes are zero.

• One slope is the negative reciprocal of the other.

• Their slopes are the same.

• Their slopes are different.