Given the linear equation 2y + 6 = 5x, find the y-intercept.
2007-06-14 09:46:34 · 9 answers · asked by Lizzie 5 in Science & Mathematics ➔ Mathematics
2y + 6 = 5x
2y + 6 - 6 = 5x - 6
2y = 5x - 6
2y / 2 = 5x / 2 - 6 / 2
y = 5/2x - 3
- - - - - - -
Y intercept or b = - 3
- - - - - - - -s-
2007-06-14 09:52:22 · answer #1 · answered by SAMUEL D 7 · 2⤊ 0⤋
The y-intercept is where the line crosses the y-axis, which is when x = 0. So, just plug in 0 for x and solve for y:
2y + 6 = 5x
2y + 6 = 5(0)
2y + 6 = 0
2y = -6
y = -3
There you have it... your y-intercept is -3.
_________________________________
2007-06-14 09:52:35 · answer #2 · answered by C-Wryte 3 · 0⤊ 0⤋
Just set "x" equal to zero.
2y+6=5(0)
2y=0-6
y=-3
2007-06-14 09:51:10 · answer #3 · answered by Anonymous · 0⤊ 0⤋
2y+6=5x
subtract 6
2y=5x-6
divivde 2
y=5/2-3
the y-intercept is -3
2007-06-14 09:59:16 · answer #4 · answered by I ♥ Big Bang! 2 · 0⤊ 0⤋
the y-intercept is where x = 0, so plug in x = 0.
2y+6 = 0
2y = -6
y = -3
2007-06-14 09:53:03 · answer #5 · answered by holdm 7 · 0⤊ 0⤋
Let x be 0,
sub x into the equation.
Sub x=0,
2y+6=0
2y=-6
y=-3
2007-06-14 09:49:46 · answer #6 · answered by psycho2400 1 · 0⤊ 0⤋
2y + 6 = 5x
y = 2.5 x - 3
Let x = 0, then Y = -3
2007-06-14 09:52:10 · answer #7 · answered by buoisang 4 · 0⤊ 0⤋
y intercept is at x=0
substitute x in your equation
2y+6=0
y=-3
2007-06-14 09:54:24 · answer #8 · answered by Alberd 4 · 0⤊ 0⤋
-3
2007-06-14 09:49:30 · answer #9 · answered by Anonymous · 0⤊ 0⤋