Find the GCF and then factor

To find the greatest common factor (GCF) of -30y^2 + 48y, we first need to factor out the common terms between the two terms.

Both terms have factors of 6 and y in common. Therefore, the GCF is 6y.

Next, factor out the GCF:

-30y^2 + 48y
= 6y(-5y + 8)

Therefore, the GCF is 6y and the factored form of -30y^2 + 48y is 6y(-5y + 8).