Home equity line interest. Sean and Amy Anderson have a home with an appraised value of 180,000 and a mortgage balance of only 90,000. Given that an S&L is willing to lend money at a loan-to-value...

Home equity line interest. Sean and Amy Anderson have a home with an appraised value of
180,000 and a mortgage balance of only
90,000. Given that an S&L is willing to lend money at a loan-to-value ratio of 75 percent, how big a home equity credit line can Sean and Amy obtain? How much, if any, of this line would qualify as tax-deductible interest if their house originally cost
100,000?