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Published byNatalie Wheeler Modified over 3 years ago

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Equations as Relations y = 2x is an equation with 2 variables When you substitute an ordered pair into an equation with 2 variables then the ordered pair is a solution of the equation. Independent Variable – the x value of an equation. Dependent Variable – the y value of an equation. The value of y is dependent on the value of x.

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Examples: 1)Solve y = - x if the domain is { – 3,0,2,6,8}. 2)Solve y = -2x + 1 if the domain is { – 4,-2,0,2, 4}.

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3)Solve 2x - 3y = 12 if the domain is {-9, -6, -3, 0, 3, 6, 9}

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4) Suppose a rectangle has a perimeter of 42mm. A)Solve the perimeter formula for w. B)State the independent & dependent variables. C)Choose 5 values for l and find the corresponding values of w.

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Substitution Method: 1. Solve the following system of equations by substitution. Step 1 is already completed. Step 2:Substitute x+3 into 2 nd equation.

Substitution Method: 1. Solve the following system of equations by substitution. Step 1 is already completed. Step 2:Substitute x+3 into 2 nd equation.

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