Y=1/7x+b
Y=mx+b
2007-09-08 16:25:52 · 6 answers · asked by RedSparkle 1 in Science & Mathematics ➔ Mathematics
B=y-1/7x
2007-09-08 16:31:05 · answer #1 · answered by steinwayboy 2 · 0⤊ 0⤋
(1) : Y=1/7x+b
(2) : Y=mx+b
You need to eliminate x in this system
mY = mx/7 + mb (multiply by m)
-Y/7 = -mx/7 - b/7 ( multiply by -1/7)
Then add,
mY - Y/7 = mb - b/7
mY - Y/7 = b(m - 1/7)
b = Y(m - 1/7)/(m - 1/7)
Y = b if m is not equal to 1/7
2007-09-08 16:44:15 · answer #2 · answered by Christine P 5 · 0⤊ 0⤋
give x a value..so just say x=1 and then mx would be 1/7 then subtract mx from Y...then you have b
2007-09-08 16:32:49 · answer #3 · answered by s h 1 · 0⤊ 0⤋
You simply can't. IF you had the coordinates of one point of this line you would need to replace the values of x and y and then you can find B.
For instance, if ( 2; 1) was a point of this line you ould need to do the following.
1 = 1/7 * 2 + b
1 = 2/7 + b
b= 1 -2/7
b= 5/7
But without a point, it is impossible.
2007-09-08 16:32:11 · answer #4 · answered by G88 3 · 0⤊ 0⤋
In the first one,
b = Y - (1/7)x
In the 2'nd one
b = Y - mx
Doug
2007-09-08 16:33:20 · answer #5 · answered by doug_donaghue 7 · 0⤊ 0⤋
b = y - 1/x
and you are done unless more info is given like a point (x,y) with actual values.
2007-09-08 16:33:28 · answer #6 · answered by 037 G 6 · 0⤊ 0⤋