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y = (20 + 3x)/5 - x
y = 4 -2x/5
Divide by 5,
Y = -2/5x + 4|dw:1332790403232:dw|
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the question is y=-0.5x+4....how would you graph that
y = mx + b, y = -2/5 + 4
M is the slope, -2/5,
B is the y-intercept, 4, which is where you start on the graph.
the y-axis is vertical, the x-axis horizontal.
Slope is rise over run. Starting at 4 on the y-axis, you go down 2 (since it's negative) and across 5 (to the right since it's positive)
Oops, I graphed the other equation!
For y = -0.5x + 4,
you would convert the decimal to a fraction, which makes it easier to graph, so
|dw:1332790725879:dw|y = -1/2x + 4
The y-intercept is 4. Plot the point (0,4), 4 on the y-axis, just like on the other one
The slope is -1/2x, so go down one from the y-intercept, then go 2 to the right
Repeat this til you run out of graph, or you can make a sufficient line.
Then connect the dots and you're done :]