Identify the coefficients in the expression below.

-6x + 5 y + 4x + 9

-6, 5, 4 are all coefficients

Coefficients are the numbers that go before a variable and describe how much of the variable is present.

The 9 isn't a coefficient, as it doesn't go with a variable. The 9 is a constant term, and will not change based on the value of the variables.