Question 1057222: I have tried going through the TI-84 plus manual that came with my calculator, so that I can graph this linear equation: 3x+4y=-16. I have not been able to graph linear equations. Can someone please tell me how to enter this equation properly into my calculator? I have solved the problem manually.
Thank you
Found 3 solutions by Boreal, addingup, MathTherapy:
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! solve it for y and graph. When you want to make a circle (x^2+y^2=9, for example), you have to solve for y^2, and then take a square root and plot each separate root in Y1 and Y2.
4y=-3x-16
y=(-3/4)x-4
Answer by addingup(3677)  (Show Source):
You can put this solution on YOUR website! y = mx+b, where x and y are the coordinates (y goes up and down, x horizontally)
3x+4y = -16
4y = -3x-16
y = -3x/4-4
Choose 0 to substitute for x:
y = -3(0)/4-4
y = 0/4-4
y = 0-4
y = -4 We now have one set of points: (0, -4)
Now choose 1 to substitute for x:
y = (3(1)/4)-4
y = 3/4-4
y = 3/4+-(4/1*4/4) - multiply to get a common denominator 4
y = 3/4-16/4
y = (3-16)/4
y = -13/4 now we have another set of points: (1,-13/4)
Try substituting 2 for x and you'll get a third set of points: (2,-5/2)
Now you have three ordered pairs you can graph:
(0, -4), (1, -13/4), (2, -5/2)
This is what you get:
Answer by MathTherapy(10551)  (Show Source):
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