Question 69682
I need to find the y-intercept of 3x+y=4. 

This is the equation of a straight line.  The standard form for this equation is :

y=mx+b 
Where m is the slope and b is the y-intercept.  This is called the slope- intercept form for a straight line.

Now we need to put your equation into standard form:

3x+y=4  subtract 3x from both sides

3x-3x+y=-3x+4
y=-3x+4  This is now in standard slope-intercept form and we can see that the y-intercept is +4 --------------ans


Again, I sure hope this helps-----ptaylor