Slope of a Line

What is the formula to calculate the slope of a line?

• (y1 - y2) / (x1 - x2)

• (y2 - y1) * (x2 - x1)

• (y2 - y1) / (x2 - x1)

• (x2 - x1) / (y2 - y1)

If a line has a positive slope, what can you say about its direction?

• The line goes upward from left to right.

• The line goes downward from left to right.

• The line goes upward from right to left.

• The line is horizontal.

Tags

CCSS.HSS.ID.C.7

What is the slope of a horizontal line?

What is the slope of a vertical line?

• 0

• 1

• infinity

• undefined

If two points on a line are (2, 3) and (5, 9), what is the slope of the line?

• 6

• 2

• 4

• 8

If two points on a line are (-4, 6) and (2, -3), what is the slope of the line?

• -2/3

• 0

• 5/2

• -3/2

If the slope of a line is 0, what can you say about its direction?

• The line is horizontal.

• The line is vertical.

• The line is diagonal.

• The line is curved.

If the slope of a line is undefined, what can you say about its direction?

• Curved

• Horizontal

• Vertical

• Diagonal

What is the slope of a line parallel to the y-axis?

• 0

• 1

• infinity

• undefined

What is the slope of a line perpendicular to the x-axis?

• undefined

• 1

• 0

• 2