find slope 2x-20y+18=0

I've been braking my head and I just can't find the solution. Can you please help me. I would really appreciate your help. Thank you so very much. I now it's m= something, but I don't know what the answer is. Thanks, again!

x - 10 y + 9 = 0

-10 y = -x - 9

y = (1/10) x + 0.9

m = 1/10