For function one, when we have the linear equation:
The unit rate will be the "m" value, here we have
Then
That's the unit rate for function one
To find out the unit rate for function two, we must take two points of the graphic, in a generical way they're are
The unit rate will be
I'll use the points
Then the unit rate will be
Hence the unit rate for function two is m = 2/3