SOLUTION: y=-2x

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Question 114154: y=-2x
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

Solved by pluggable solver: PLOT any graph
Graphing function -%282x%29:

graph%28+600%2C+600%2C+-20%2C+20%2C+-20%2C+20%2C+-%282x%29+%29



Here is another way with more details included

Solved by pluggable solver: Graphing Linear Equations
In order to graph y=-2%2Ax%2B0 we only need to plug in two points to draw the line

So lets plug in some points

Plug in x=-4

y=-2%2A%28-4%29%2B0

y=8%2B0 Multiply

y=8 Add

So here's one point (-4,8)




Now lets find another point

Plug in x=-3

y=-2%2A%28-3%29%2B0

y=6%2B0 Multiply

y=6 Add

So here's another point (-3,6). Add this to our graph





Now draw a line through these points

So this is the graph of y=-2%2Ax%2B0 through the points (-4,8) and (-3,6)


So from the graph we can see that the slope is -2%2F1 (which tells us that in order to go from point to point we have to start at one point and go down -2 units and to the right 1 units to get to the next point), the y-intercept is (0,0)and the x-intercept is (0,0)


We could graph this equation another way. Since b=0 this tells us that the y-intercept (the point where the graph intersects with the y-axis) is (0,0).


So we have one point (0,0)





Now since the slope is -2%2F1, this means that in order to go from point to point we can use the slope to do so. So starting at (0,0), we can go down 2 units



and to the right 1 units to get to our next point


Now draw a line through those points to graph y=-2%2Ax%2B0


So this is the graph of y=-2%2Ax%2B0 through the points (0,0) and (1,-2)