Ice cream demand curve line graph. The x-axis is labeled quantity (cups) and runs from 0 to 1,500If you were to raise prices of a cup of ice cream by $1, by how much would quantity demanded change (in terms of ice cream cups)? in increments of 500. The y-axis is labeled price (US dollar per cup) and rises from $0 to $20 in increments of $2. The line has a downward slope from left to right. Quantity Price 0 $20 250 $16 500 $12 750 $8 1000 $4 1250 $0