find the slope and y-intercept
x+2y=8
help with math?
2008-04-17 1:51 pm
回答 (9)
2008-04-17 1:57 pm
✔ 最佳答案
Put it into the form of y = mx + b, where m = slope and b = y - intercept.So it becomes:
x + 2y = 8
x + 2y - x = 8 - x
x - x + 2y = 8 - x
2y = 8 - x
2y/2 = (8 - x)/2
y = (8 - x)/2
y = 4 - ½x
y = -½x + 4
Therefore slope = m = -½ and y - intercept = b = 4
Hope this helps!
2008-04-17 2:00 pm
Given Equation is
x + 2y = 8
For y-intercept put x= 0,
We have
2y = 8
or y = 4
For Slope , WEcan write yhe eq.
2y = 8 - x
OR
y = -x/2 + 8/2
y = -x/2 + 4
It is clear that slope is
m = -1/2 Ans
x + 2y = 8
For y-intercept put x= 0,
We have
2y = 8
or y = 4
For Slope , WEcan write yhe eq.
2y = 8 - x
OR
y = -x/2 + 8/2
y = -x/2 + 4
It is clear that slope is
m = -1/2 Ans
2008-04-17 1:57 pm
The function x+2y=8 has to be re-written as a function of x alone:
y = something..
x+2y=8
2y=8-x
y=(8-x)/2
y=-x/2+8/2
y=-x/2+4
y=ax+b where a=slope and b=y-intercept
thus
slope=-1/2
y-intercept=4
y = something..
x+2y=8
2y=8-x
y=(8-x)/2
y=-x/2+8/2
y=-x/2+4
y=ax+b where a=slope and b=y-intercept
thus
slope=-1/2
y-intercept=4
2008-04-17 1:57 pm
rearrange
2y = 8 - x
y = 4 -x/2
Y intercept is when x=0
so, y = 4
slope is the coefficient infront of the x term
-x/2 = (-1/2)x
Therefore your slope is -1/2 or -0.5
2y = 8 - x
y = 4 -x/2
Y intercept is when x=0
so, y = 4
slope is the coefficient infront of the x term
-x/2 = (-1/2)x
Therefore your slope is -1/2 or -0.5
2008-04-17 1:56 pm
Standard form is y = mx+c where m = slope and c = y intercept
x+2y=8
2y = -x+8
y = -½x + 8, giving you slope and intercept
x+2y=8
2y = -x+8
y = -½x + 8, giving you slope and intercept
2008-04-17 2:10 pm
x + 2y = 8
2y = 8 - x
y = (8 - x)/2
2y = 8 - x
y = (8 - x)/2
2008-04-17 2:02 pm
first, change the equation to be the standard of y=mx+c, where M=gradient, c= y-intercept.
So from, x+2y=8
it becomes, y=-x/2+4
So therefore, the y-intercept is= 4.
The gradient, however is negative, therefore the slope will look like your right hand should you put it up like this /\. Hope it helps.
So from, x+2y=8
it becomes, y=-x/2+4
So therefore, the y-intercept is= 4.
The gradient, however is negative, therefore the slope will look like your right hand should you put it up like this /\. Hope it helps.
參考: I top my class in math all the time.
2008-04-17 2:01 pm
There are various equation formats such as "Y=mx+b"; However slope is just "rise over run" and y intersect is the Y value when x=0.
0*x+2y=8
2y=8
Y=4
4= the Y intercept value for Y.
x+2y=8
2y= 8-x
Y= -0.5x + 4
U should be able 2 get he rest elsewhere....
0*x+2y=8
2y=8
Y=4
4= the Y intercept value for Y.
x+2y=8
2y= 8-x
Y= -0.5x + 4
U should be able 2 get he rest elsewhere....
2008-04-17 2:01 pm
If you rewrite the form in standard notation, you will get your answer.
Solve for y to get it in standard notation:
x+2y=8
2y=-x+8
y=-(1/2)x+4
In standard notation, the factor of x is the slope and the constant is the y intercept.
Slope: -1/2
Y intercept: 4
Solve for y to get it in standard notation:
x+2y=8
2y=-x+8
y=-(1/2)x+4
In standard notation, the factor of x is the slope and the constant is the y intercept.
Slope: -1/2
Y intercept: 4
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