http://www.ck12.org Chapter 3. Parallel and Perpendicular Lines
Guided Practice
Find the slope between the two given points:
- (3, -4) and (3, 7)
- (6, 1) and (4, 2)
- (5, 7) and (11, 7)
Answers:
- These two points create a vertical line, so the slope is undefined.
- The slope is((^24 −−^16 ))=−^12.
- These two points create a horizontal line, so the slope is zero.
Interactive Practice
MEDIA
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Find the slope between the two given points.
- (4, -1) and (-2, -3)
- (-9, 5) and (-6, 2)
- (7, 2) and (-7, -2)
- (-6, 0) and (-1, -10)
- (1, -2) and (3, 6)
- (-4, 5) and (-4, -3)
- (-2, 3) and (-2, -3)
- (4, 1) and (7, 1)
- (22, 37) and (-34, 56)
- (13, 12) and (-23, 14)
- (-4, 2) and (-16, 12)
For 12-15, determine if the statement is true or false.
- If you know the slope of a line you will know whether it is pointing up or down from left to right.
- Vertical lines have a slope of zero.
- Horizontal lines have a slope of zero.
- The larger the absolute value of the slope, the less steep the line.