How to solve the equation of this line
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > How to solve the equation of this line

How to solve the equation of this line

[From: ] [author: ] [Date: 11-06-19] [Hit: ]
To sove for b,y = (2/3)x - 9-It looks quite complicated but its not really! If it is parallel to the line 2x-3y=11, then the gradients of the two lines will be equal. So rearrange the equation ----> 2x-11=3y -----> y=(2/3)x - (11/3).So the gradient of your line is 2/3.......
If you can, explain the steps necessary to solve this problems and others like it.
Write an equation of the line that passes through the point (6,-5) and is parallel to the line whose equation is 2x-3y=11

-
First, rewrite 2x - 3y = 11 into slope-intercept form y = mx + b

Subtract 2x from both sides:

-3y = -2x + 11

Divide through by -3:

y = (2/3)x - 11/3

The slope of the line is 2/3. A parallel line has the same slope.


The equation for the new line starts as:

y = (2/3)x + b where b is the y-intercept

To sove for b, substitute the x and y values of the point you've been given:

-5 = (2/3)6 + b

Multiply it out:

-5 = 4 + b

Subtract 4 from both sides:

b = -9

The full equation for the new line is:

y = (2/3)x - 9

-
It looks quite complicated but it's not really! If it is parallel to the line 2x-3y=11, then the gradients of the two lines will be equal. So rearrange the equation ----> 2x-11=3y -----> y=(2/3)x - (11/3).
So the gradient of your line is 2/3. Okay, now the standard equation for any line is y=mx+c, right? And m is the gradient. So then you plug in x and y coordinates of the point it passes through ----> y=(2/3)x+c -----> -5 = (2/3)*6 + c, Solve for c, which gives c = -9
Therefore, the equation of the line: y = (2/3)x - 9
Hope that helps!

-
let the equation which parallel to given equation is
2x-3y= k

then this equation passes throw (6,-5),this point satishfied by last equation so put the value of x and y for finding the value of k.
We get
2*6-3*(-5)=k,
12+15 =k
27=k, putting the value of k in above equation,we get
2x-3y=27
this is required equation.

-
write the first equation in the form of y=mx+b
-3y=-2x+11
y=2/3x-11/3 so the second equation line must have a slope of 2/3 to be parallel. now use the
y=mx+b to get a new equation for the line passing thru 6,-5

-5=2/3(6)+b
-5=4+b
b=-9 so the equaation is y=2/3x-9 or y-2/3x=-9 or -3y+2x=27 ==> 2x-3y=27

-
Keep the coefficients of the variables the same:

2x - 3y = C

Plug in values for x and y and solve for C

x = 6
y = -5

2 * (6) - 3 * (-5) = C
12 + 15 = C
27 = C

So, the equation of the line is:

2x - 3y = 27
1
keywords: of,line,this,solve,How,to,equation,the,How to solve the equation of this line
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .