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Mathematics, 04.04.2020 13:02 swspanda179400

Lisa and John work in different department stores. Lisa earns a salary of $18,000 per year plus a 2% commission on her sales. John receives no salary but earns a 6% commission on his sales. For each person, tell whether annual sales and annual earnings show direct variation. Justify your answers mathematically. Please show all steps.

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Lisa and John work in different department stores. Lisa earns a salary of $18,000 per year plus a 2%...
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