öf different numbers of goldfish at a pet store. COST OF GOLDFISH Number of Goldfish Cost $1.50 10 $3.00 15 $4.50 20 $6.00 The cost is a linear function of the number of goldfish. Which statement describes the rate of change of this A The cost increases $0.30 each time 1 goldfish is added. The cost increases $1.50 each time 1 goldfish is added. The cost increases $3.00 each time 5 goldfish are added. D The cost increases $6.00 each time 5 goldfish are added. SHOW HINT

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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.