Hi,

Can you refer the photo and explain why the result is -10.20 please? I don't understand it. Thank you!

In the graph on the right, the demand for sub sandwich rolls has changed because the price of sandwich meat has risen from $2.50 to $2.60 per package. The cross-price elasticity of demand between sandwich meat and sub sandwich rolls is - 1020'. (Use the midpoint formula and enter your response rounded to two decimal places. Be sure to include the minus sign if necessary.) Submarine sandwich rolls spam: i7,oo9,ooo 3,000 6,000 9,000 12,000 15,000 Quantity (packages of rolls per week)