What you need to do is look at the number in front of all the variables.
a) 1 Explanation: how many ys are there? 1 is the answer. (The reason we don't NEED to write 1 before a variable is for the same reason that when I say I have 1 thing, I can just say I have a thing. I don't need to include the 1)
c) 6 Explanation: how many sts are there? 6 is the answer.
d) -15 Because a variable to the '0' power equals 1, we can write this as -15x^0 and then we can come to -15(1) which is just -15. We write is with the x^0 so that we can ask, how many x^0 are there? -15 is the answer.
e) -1 Explanation: just like the coefficient of JUST dh would be 1, the coefficient of NEGATIVE dh would be -1
f) 1 Explanation: how many bcs are there? The answer is 1.
