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Question 1012820: How to graph -2x+1200
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! the equation is y = -2x + 1200.
when x = 0, the value of y is 1200.
one of your points will be (0,1200)
you can solve the equation to find the x-intercept.
that's one way.
set y = 0 to get 0 = -2x + 1200
solve for x to get x = -1200/-2 = 600.
another one of your points will be (600,0).
you have two points.
they are (0,1200) and (600,0).
all you have to do now is create your graph and scale it so that the y value goes up to at least 1200 units and the x value goes to the right at least 600 units and draw a straight line between those two points.
you also want it to be a little larger.
i sized it for a minimum of -300 to 1500 vertical and -200 to 800 horizontal.
that's your graph.
it should look something like this:
the biggest thing in creating your graph is how to scale it.
scaling is an art that you get better at the more you do it.
your graph paper has squares on it.
you need to determine how many units per square you need vertically and horizontally.
if you have a 30 square vertical by 20 square horizontal graph paper, and you need 2000 units vertical and 1000 units horizontal, and you want the horizontal units to be the same size as the vertical units, then you would need to do the following:
divide 2000 by 30 to get 66.67 units per square vertical.
divide 1000 by 20 to get 50 units per square horizontal.
you want each square to have the same units vertically as horizontally, so you pick the bigger value per square.
you also want to pick something that's easy to show.
in this case, i would choose as a minimum 70 units per square vertical and horizontal.
i would choose as a maximum 100 units per square vertical and horizontal.
then you draw your graph and see how it looks.
if you like it, you go with it.
if not, you adjust.
naturally, when you use graphing software, all this assigning units to sqaures doesn't really apply.
all you have to do there is make sure the scaling of the minimun and maximum values is what you want to make the graph look ok.
the graph i showed you above met that requirement for me.
at least good enough to show you how the grpah would look.
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