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y(x) = k x; where k is constant and x is variable

If x increases, y (x) will increase

Application: X(t) = v*t; where v is a average speed and t is time variable. and X(t) is distance travel
If t increases, X(t) will increase.

Direct inverse:

V(t) = X/t  ;  where V(t) is the speed X is known distance and t is a time variable.

If t increases, V(t) will decrease.
If it will take you longer in time to get there, you do not have to drive fast, vice versa.

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Where the line intercept y -axis. It is at (0,2) coordinate.

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From the y-intercept, go down  2 unit then go to the right, x-axis 1 until to touch the line.
Slope, m= -2/1 = -2
Go down means negative (-)
Go up means positive (+)
Go to the right means positive (+)

y(x) = mx +b
y(x) = -2x + b

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From the intersect of both line, where the coordinate is (2,2).
It is the solution x=2 and y=2

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Solve system equations without the graph:

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Solve system equations without the graph:

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x -2y = -2
3x - 2y = 2
Subtract first equation to second equation:
-2x = -4,

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More Word Problems Using Quadratic Equations - Example 1

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We did a similar problem in POW5, here is the video.

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We did a similar problem in POW5, here is the video.

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Boy Scout Camp Goshen, July 18 - August 4, 2018