I’m confused on question 6 however I feel like the answer is B can someone check please?

What is the measure of ac? 5 units 13 units 26 units 39 units

What is the quadric regression equation that fits these data

If your annual gross income is $62,000 and you have one monthly car payment of $335 and a monthly student loan payment of $225, what is the maximum house payment you can afford. consider a standard 28% front-end ratio and a 36% back-end ratio. also, to complete your calculation, the annual property tax will be $3,600 and the annual homeowner's premium will be $360.