Equations as Relationsy = 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.

Examples:1) Solve y = -⅓x if the domain is {–

3,0,2,6,8}.

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

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

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.