1.A local bank has a debit card that gives a $3 reward each month you use your card for $50 or more in purchaces. Write an equation relating rewards earned,y, to total monthly purchaces, x. Give the domain of this function.
2. A local credit union has a debit card that rewards 3% of your total monthly purchases. Write an equation relating rewards earned,y, to total monthly purchases, x. Give domain of this function.

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it has no lower limit, so i would say the domain is \((0,\infty)\) or "positive numbers"

Honestly, any input would be appreciated. I'm totally clueless!

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