The expression we have is:
[tex]5z^3-2z^4-9z^2+z[/tex]Step 1. Arrange the terms from the one with the highest degree to the one with the lowest degree (the highest exponent on the z to the lowest):
[tex]-2z^4+5z^3-9z^2+z[/tex]Step 2.
in this case, since we already arranged the terms from highest to lowest degree, the leading coefficient is the coefficient of the first term:
[tex]-2[/tex]Answer: -2