Free points you can talk to me if you want

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test