How do you work this SLOPE problem? (4,-5), (3,r) m=8
2006-11-27 10:42:29 · 3 answers · asked by Be my fan Please! 3 in Science & Mathematics ➔ Mathematics
Use the formula for slope:
m = (y2 - y1) / (x2 - x1)
PLugging in m = 8, x2 = 4, y2 = -5, x1 = 3 and y1 = r, we have
(-5-r) / (4-3) = 8
(-5-r) / 1 = 8
-5 - r = 8
-r = 13
r = -13
2006-11-27 10:44:39 · answer #1 · answered by MsMath 7 · 1⤊ 2⤋
(3,-13)
m = (y2-y1)/(x2-x1)
We know everything except y1 (or, if you prefer, y2) so let's plug all of the values in.
8=(y2-(-5))/(3-4)
8=(y2+5)/(-1)
-8=y2+5
y2=-13
It's just an application of the slope formula, and you need to find an unknown.
Hope this helps.
2006-11-27 10:45:15 · answer #2 · answered by Aegor R 4 · 2⤊ 0⤋
m is slope
thus the slope is 8
however i believe you are looking for r
slope = (rise/run) = 8/1
so for every 1 that you run (move x over), you rise (y up) 8
you went form 4-3
thus you run-1
thus your rise wille be -8
thus r = -5-8
r=-13
2006-11-27 10:45:00 · answer #3 · answered by The Russian 2 · 1⤊ 0⤋