For this case we have that by definition, the slope of a line is given by:

Where:
and
are two points through which the line passes.
Question 1:
According to the image, we have the following points:

Substituting we have:

Thus, the slope is:

Question 2:
According to the image, the line goes through the following points:

Substituting we have:

Thus, the slope is:

Answer:
Slope 1:

Slope 2:
