According to the income section below from the 1040EZ form, if $3125 were entered on line 2 (Taxable interest), the taxpayer would be ineligible to use the 1040EZ form.
On line 1, the wages, salaries, and tips are entered. On line 2, taxable interest is entered.
According to the income section, if the total on Line 2 is more than $1500, the taxpayer cannot use the 1040EZ form to file taxes.
Thus, since $3,125, exceeds $1,500, form 1040EZ is not for the taxpayer.