Monday, October 27, 2014

Find the equation of the line which has Y-intercept 4 &is parallel to line 2x-3y=7.Find the co-ordinates of the point where it cuts X-axis.

The equation of a line with a y-intercept of c and a slope
of m is given as y=mx + c.


The line we have to determine is
parallel to the line 2x - 3y = 7. This is possible if they have the same
slope.


2x - 3y = 7


=>
3y = 2x - 7


=> y = (2/3)x -
(7/3)


The slope of the line we have to determine is (2/3).
Its y-intercept is 4, this gives the equation of the line
as


y = (2/3)x + 4


=> 3y
= 2x + 12


=> 2x - 3y + 12 =
0


Where the line intersects the x-axis y =
0


=> 2x = -12


=>
x = -6


The coordinates of the point where it intersect the
x- axis is (-6 , 0)


The required equation of
the line is 2x - 3y + 12 = 0 and the coordinates of the point where it intersects the
x-axis are (-6 , 0)

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