18.State the slope and y- intercept of the graph of 7x + 4y =28.
A. m=7/4,b= -7
B. m= -7/4,b= -7
C.m= -7/4,b=7
D.m=7/4,b=7
2007-08-16 02:05:46 · 5 answers · asked by Delilah 2 in Science & Mathematics ➔ Mathematics
y=(-7/4)x+7
m=(-7/4)
c=7
ans is C.
2007-08-16 02:16:58 · answer #1 · answered by MathStudent 3 · 0⤊ 0⤋
Hi,
The simplest way to do this is to put the equation in slope-intercept form. Then you can read off the slope and y-intercept.
The slope-intercept form is:
y = mx +b where m is the slope and b is the y-intercept.
So, let's do your equation:
7x +4y = 28
4y =-7x +28 (Subtract 7x from both sides of the equation.)
y = -(7/4)x +7 (Divide both sides by 4)
Comparing this with y = mx +b, m = -7/4 and b=7
Hope this helps.
FE.
2007-08-16 09:19:19 · answer #2 · answered by formeng 6 · 0⤊ 0⤋
Put in slope-intercept form (y=mx+b)
y=-(7/4)x+7
C.
2007-08-16 09:11:37 · answer #3 · answered by Norm 3 · 0⤊ 0⤋
the answer is c
2007-08-16 09:53:51 · answer #4 · answered by i_am_sexy_so_kiss_me 1 · 0⤊ 0⤋
C
2007-08-16 09:41:01 · answer #5 · answered by llamallord 4 · 0⤊ 0⤋