An equation represents a proportional relationship. For every 4 units that the x-values c the graph of the equation increase, the y-values decrease by 5 units. Which graph best represents the relationship? 6F 6. 4. 4 3. 2 3 2. -6 -5-4 12345 6 6-5-4-3-2 -1 23456 -2 -3 -3 -4 -4 -5 -5 123 S

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.