Calculating SLOPES What slope means Slope tells you
- Slides: 14
Calculating SLOPES
What slope means Slope tells you how ‘slanted’ a line is • Roofers call it ‘pitch’ • Highway engineers call it ‘grade’ • Mathematicians call it ‘slope’
THE BUNNY SLOPE A line with a small slope only slants a little.
Double Black Diamond Expert Slope A line with a large slope slants a lot.
Cross-country skiing A line with a slope of zero is flat
OMIGOSH - A CLIFF! If a line has a slope that is undefined it isn’t a ski slope IT’S A CLIFF! Vertical lines have undefined slopes.
Signs of slopes • Uphill from left to right: sign + • Downhill from left to right: sign – • Flat: (horizontal) • Cliff: (vertical) slope = 0 slope is undefined.
Calculating slopes Slope is: Find the slope between (x 1, y 1) and (x 2, y 2): NOTE: If you start with y 1 on the top, you must start with x 1 on the bottom since they are from the same ( )
Calculating slopes Find the slope between (4, 3) and (-1, 2): If you start with y 1 = 3 on the top, If you start with y 2 = 2 on the top, you must start with x 1 = 4 on the bottom you must start with x 2 = -1 on the bottom since they are from the same ( )
Calculating harder slopes next. . .
Calculating harder slopes next. . .
Calculating harder slopes next. . .
Calculating harder slopes
Calculating slopes is easy Just remember to subtract in the correct order!
Check if you can remember what tim tells you
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