I understand that it's delta y / delta x. I'm a bit confused about these two questions.

Get m at x = 1

#1y = x^2+3x

My work:

((x^2+3x+h) - x^2 - 3x)/h

h/h = 1

m (slope) = 1?

#2x^2-4x+3

((x^2-4x+3+h) - (x^2-4x+3))/h

h/h = 1

m (slope) = 1?