Calculating Future Spot Price for Options

Dear Sir,
I watched your lectures, and I have understood the majority of what you have explained, but there’s still one thing that i’m unsure about.

In questions, Awan, Alecto & Wardegul the future spot prices/rates are given, in other words, the spot rate/price at the date of receipt or borrowing is given.

But there are questions where that rate is NOT given, and therefore need to be calculated, such as in the question Casasophia. Here is where my doubt lies:

Say the current spot rate 1.5 and the current future rate is 1.6. Since the current spot rate / price is lower than the current future rate / price, does this mean, that on the date of the transaction, the spot rate/ price will be lower than the future price on that date?

So, is this the basis for the second formulae you mentioned in the classroom, where:

Future’s price on transaction date = Current futures rate / price + or – the unexpired basis.

My question is basically, in the above formula should it be a “+” if current future rate/price is higher than current spot rate/price and should it be a “-” if current future rate/price is lower than current spot rate/price?

Thank you 🙂