SOLUTION: 4x + 3y = 12

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Question 149376: 4x + 3y = 12
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Do you want to graph?

4x+%2B+3y+=+12 Start with the given equation.


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


y=%2812-4x%29%2F%283%29 Divide both sides by 3 to isolate y.


y=-%284%2F3%29x%2B4 Simplify.




Looking at y=-%284%2F3%29x%2B4 we can see that the equation is in slope-intercept form y=mx%2Bb where the slope is m=-4%2F3 and the y-intercept is b=4


Since b=4 this tells us that the y-intercept is .Remember the y-intercept is the point where the graph intersects with the y-axis

So we have one point




Now since the slope is comprised of the "rise" over the "run" this means
slope=rise%2Frun

Also, because the slope is -4%2F3, this means:

rise%2Frun=-4%2F3


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 , go down 4 units


and to the right 3 units to get to the next point



Now draw a line through these points to graph y=-%284%2F3%29x%2B4

So this is the graph of y=-%284%2F3%29x%2B4 through the points and