Tuesday, January 21, 2014

How to find x and y intercepts for the equation 2x+3y-15=0?

The x-intercept has a y-value of 0 and the y-intercept has
an x-value of 0.  Therefore, you can find the x and y intercepts by substituting 0 in
for each variable one at a
time.


x-intercept:


2x + 3(0) -
15 = 0


2x - 15 = 0


2x =
15


x = 7.5


The
x-intercept is (7.5,
0).



y-intercept:


2(0)
+ 3y - 15 = 0


3y - 15 = 0


3y =
15


y = 5


The
y-intercept is (0, 5).



You can
check this answer by graphing the line.


Rewrite the
equation as y = (-2x + 15) / 3


type="image/svg+xml"
src="/jax/includes/tinymce/jscripts/tiny_mce/plugins/asciisvg/js/d.svg"
sscr="-1,8,-1,6,1,1,1,1,1,300,200,func,(-2x+15)/3,null,0,0,,,black,1,none"/>


The
line intersects the x-axis at 7.5 and the y-axis at 5.

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