SOLUTION: how to graph these inequality's in a coordinate plane x+4y>-12 and in another coordinate plane ' 3x-y _> 1

Algebra ->  Graphs -> SOLUTION: how to graph these inequality's in a coordinate plane x+4y>-12 and in another coordinate plane ' 3x-y _> 1       Log On


   

Question 840692: how to graph these inequality's in a coordinate plane
x+4y>-12
and in another coordinate plane '
3x-y _> 1
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Plot the lines first.
Then choose a point in the region not on the line.
If the equation is true, that region should be shaded.
Else, the other region.
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C%28-12-x%29%2F4%29
Choose (0,0), it's convenient.
0%2B4%280%29%3E=-12
0%3E=-12 True, shade the region containing (0,0).
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2Cy%3E=%28-12-x%29%2F4%29
.
.
.
Similarly,
graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C3x-1%29
Again choose (0,0), it's convenient.
3%280%29-0%3E=1
0%3E=1 False, shade the region that doesn't contain (0,0).
graph%28300%2C300%2C-5%2C5%2C-5%2C5%2Cy%3C=3x-1%29