2007-01-07 06:42:47 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Ooooh, you guys are so right!!! Thank you a mill!!!!!
2007-01-07 06:46:40 · update #1
In the case of Y=-5, the slope is zero because when you graph y=-5, you get a horizontal (flat) line the crosses the Y axis at -5. Since there is no gain in height, there is no slope. Hence slope = zero/
X=6 has an undefined slope because the the graph is a vertical (up and down) line that crosses the X axis at 6which would be an infinit slope. With infinity being undefined numerically, the slope is undefined.
2007-01-07 06:48:46 · answer #1 · answered by Kevin C 3 · 0⤊ 0⤋
the definition of slope is rise over run or the change in the Y value divided by the change in the X value. the line Y = -5 has no change in Y value (it is always -5) so the slope would be 0/(doesn't really matter) and thus the slope is always zero b/c 0 divided by anything (except 0) is 0. the line X = 6 has no change in X value so the slope would be (doesn't matter)/0 and ANYTHING divided by 0 is simply undefined because it could mean various different things, but in this case it means that the line is vertical.
2007-01-07 06:50:43 · answer #2 · answered by E-Z 1 · 0⤊ 0⤋
y = -5 has a slop of zero because the line is horizontal. x = 6 has a undefined slope because it is a vertical line and hence a slope that is an infinite number.
2007-01-07 06:45:29 · answer #3 · answered by Michael 2 · 0⤊ 1⤋
Yeah, you're absolutely right.
A line with the equation y = b is horizontal. Therefore, it's slope is 0.
A line with the equation x = b is vertical. It's slope is undefined.
2007-01-07 06:45:50 · answer #4 · answered by teekshi33 4 · 0⤊ 0⤋
yup! the line on the y-axis is horizontal, and all horizontal lines have a slope of zero. the one on the x-axis is vertical, and vertical lines' slopes are ALWAYS undefined.
2007-01-07 06:45:08 · answer #5 · answered by kittyluvr0223 3 · 0⤊ 0⤋