find the y-intercept of the equation?

3 ⤊

find the y-intercept of the equation?

7x-3y+21=0

2007-12-10 02:44:53 · 4 answers · asked by shakelia 1 in Science & Mathematics ➔ Mathematics

4 answers

7x-3y+21=0
y=7/3x+7
y intercept = 7

2007-12-10 02:48:24 · answer #1 · answered by Anonymous · 1⤊ 0⤋

7x-3y=-21
in y intercept, x= 0
so,
3y=21
y=7

2014-08-14 12:58:47 · answer #2 · answered by ? 2 · 1⤊ 0⤋

Remember that the straight line formula is y=mx+b and the slope is m

7x-3y+21=0
Subtr 7x from both sides -3y+21=-7x
Multiply both sides by -1 3y-21=7x
Add 21 to both sides 3y=7x+21
Divide both sides by 3 ____ y=7/3x +7
The slope is 7/3

2007-12-10 11:01:07 · answer #3 · answered by Top Gun 3 · 0⤊ 0⤋

- 3y + 21 = 0
y = 7 is y intercept.

2007-12-10 10:48:58 · answer #4 · answered by Como 7 · 1⤊ 0⤋