Question 149376
Do you want to graph?


{{{4x + 3y = 12}}} Start with the given equation.



{{{3y=12-4x}}} Subtract {{{4x}}} from both sides.



{{{y=(12-4x)/(3)}}} Divide both sides by {{{3}}} to isolate {{{y}}}.



{{{y=-(4/3)x+4}}} Simplify.





Looking at {{{y=-(4/3)x+4}}} we can see that the equation is in slope-intercept form {{{y=mx+b}}} where the slope is {{{m=-4/3}}} and the y-intercept is {{{b=4}}} 



Since {{{b=4}}} this tells us that the y-intercept is *[Tex \LARGE \left(0,4\right)].Remember the y-intercept is the point where the graph intersects with the y-axis


So we have one point *[Tex \LARGE \left(0,4\right)]


{{{drawing(500,500,-10,10,-10,10,
  grid(1),
  blue(circle(0,4,.1)),
  blue(circle(0,4,.12)),
  blue(circle(0,4,.15))
)}}}



Now since the slope is comprised of the "rise" over the "run" this means

{{{slope=rise/run}}}


Also, because the slope is {{{-4/3}}}, this means:


{{{rise/run=-4/3}}}



which shows us that the rise is -4 and the run is 3. This means that to go from point to point, we can go down 4  and over 3




So starting at *[Tex \LARGE \left(0,4\right)], go down 4 units 

{{{drawing(500,500,-10,10,-10,10,
  grid(1),
  blue(circle(0,4,.1)),
  blue(circle(0,4,.12)),
  blue(circle(0,4,.15)),
  blue(arc(0,4+(-4/2),2,-4,90,270))
)}}}


and to the right 3 units to get to the next point *[Tex \LARGE \left(3,0\right)]

{{{drawing(500,500,-10,10,-10,10,
  grid(1),
  blue(circle(0,4,.1)),
  blue(circle(0,4,.12)),
  blue(circle(0,4,.15)),
  blue(circle(3,0,.15,1.5)),
  blue(circle(3,0,.1,1.5)),
  blue(arc(0,4+(-4/2),2,-4,90,270)),
  blue(arc((3/2),0,3,2, 0,180))
)}}}



Now draw a line through these points to graph {{{y=-(4/3)x+4}}}


{{{drawing(500,500,-10,10,-10,10,
  grid(1),
  graph(500,500,-10,10,-10,10,-(4/3)x+4),
  blue(circle(0,4,.1)),
  blue(circle(0,4,.12)),
  blue(circle(0,4,.15)),
  blue(circle(3,0,.15,1.5)),
  blue(circle(3,0,.1,1.5)),
  blue(arc(0,4+(-4/2),2,-4,90,270)),
  blue(arc((3/2),0,3,2, 0,180))
)}}} So this is the graph of {{{y=-(4/3)x+4}}} through the points *[Tex \LARGE \left(0,4\right)] and *[Tex \LARGE \left(3,0\right)]