In 2013, you buy shoes for $2 a pair and socks for $1 a pair, and your income is $30, with which you buy 12 pairs of shoes and 6 pairs of socks. In 2014, you buy shoes for $1 a pair and socks for $2 a pair, and your income is still $30.
Draw both years' budget lines. Notice that they cross at the point (10, 10).
True or False: In 2014, you will surely buy more than 10 pairs of shoes.
True or False: In 2014, you will surely buy more than 12 pairs of shoes.