Tuesday, January 28, 2014

What are y intercepts of the lines 6x + 7y = 35 , 6x - 3y = -15

We'll have to put the given equations in the standard
form:


y = mx + n, where m is the slope and n is y
intercept.


To put it into the standard form, we'll have to
isolate y to the left side. For this reason, we'll subtract 6x and add 35 both
sides:


7y = -6x + 35


We'll
divide by 7 both sides:


y = -6x/7 +
35/7


y = -6x/7 +
5


We notice that the y
intercept of the line
is 5.


6x-3y+15=0 


To
put it into the standard form, we'll have to isolate y to the left side. For this
reason, we'll subtract 6x and 15 both sides:


-3y = -6x -
15


We'll divide by 3 both
sides:


y = 2x +
5


We notice that the given
line has the y intercept of 5, also.

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