i-Ready Linear Functions: Model from Two Points - Quiz - Level H Nevaeh uses a gift card to buy a cup of coffee every morning. The table shows the amount of money remaining on the card, y, as a function of the number of cups of coffee she buys, c. The rate of change is -3 since each cup of coffee costs $3. How much money was on the gift card when Nevaeh received it? $30 What is the equation of the function? y = ? x+ ? DONE Number of Cups of Coffee, a 3 4 6 Amount of Money Remaining ($), y ID 21 18 12 6​