Gift card

Lauren was given a gift card for a coffee shop. Each morning, Lauren uses the card to buy one cup of coffee. The original amount of money on the gift card was $10, and each cup of coffee costs $2. Make a table of values and then write an equation for A, in terms of x, representing the amount of money remaining on the card after buying x cups of coffee.

Correct answer:

A = 10-2*x

Step-by-step explanation:

$$\begin{gathered} A(x)=10-2\cdot x \\ A(0)=10\text{USD} \\ A(1)=10-2\cdot 1=8\text{USD} \\ A(2)=10-2\cdot 2=6\text{USD} \\ A(3)=10-2\cdot 3=4\text{USD} \\ A(4)=10-2\cdot 4=2\text{USD} \\ A(5)=10-2\cdot 5=0\text{USD} \\ A=10-2\cdot x \end{gathered}$$

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