y - intercept (0, 1/2), slope is 3/4.
I thought it would be y= 3/4 x + 3,
but the answer book says
y=3/4 x + 1/2
where did they come up with 1/2 instead of 3?
ahhhhhhhhhhhhhhhhh
thanks
2007-10-01 09:01:14 · 7 answers · asked by Boo Radley 4 in Science & Mathematics ➔ Mathematics
When you graph (0, 1/2), you go up 1/2 on the y axis. The y intercept is where the line crosses the y axis, so in this problem, 1/2 is the y intercept.
y=mx+b
m is the slope
b is the y intercept
y=3/4x+1/2
hope this helps = ]
2007-10-01 09:05:27 · answer #1 · answered by Vanessa 4 · 0⤊ 0⤋
I'm not sure where you got the "3" from.
In the equation, "y = mx + b",
m is the slope (you got that right, it's 3/4)
b is the y-intercept.
The problem tells you that the point of the y-intercept is (0, 1/2). The y-intercept is the y-coordinate of that point. In other words, it's 1/2.
2007-10-01 09:06:29 · answer #2 · answered by RickB 7 · 0⤊ 0⤋
the 1/2 came from the y-intercept ( (0,1/2) ) .
The "b" of the equation is always when x =0..meaning the y-int.
I don't know how you got 3..
2007-10-01 09:06:47 · answer #3 · answered by stratusfaction92 2 · 0⤊ 0⤋
y = mx + c is equation where m is gradient and c is y intercept.
Thus , in this case:-
y = (3/4) x + 1/2
2007-10-01 10:42:39 · answer #4 · answered by Como 7 · 1⤊ 0⤋
its add 1/2 because the line intercepts the y axis at 1/2 thats why you have to add the half. hope this helps .. =) good luck ..
by the way if this dont help ask your teacher im sure theyll be happy to help .. =)
2007-10-01 09:09:50 · answer #5 · answered by aRsEnAl .. xX 2 · 0⤊ 0⤋
You already knew that m = 0.75, and that the line passes through (0,0.5) (x,y!)
So the equation becomes:
y=mx + b
0.5 = (0.75)(0.0) + b
b=0.5 (or 1/2)
2007-10-01 09:13:52 · answer #6 · answered by tinfoil666 3 · 0⤊ 0⤋
That's right. Y-intercept is "b" in y=mx+b.
2007-10-01 09:12:47 · answer #7 · answered by tyrambo 2 · 0⤊ 1⤋