Question

What is the answer to this problem?

Answer 1

The slope of a line is $\frac{dy}{dx}$

where $d$ is the difference and $y$ and $x$ are the values.

In this case, the difference in $y$ is 10 and the difference in $x$ is 0

And division where the denominator being 0 leads to the answer being Undefined or Infinity as the line is directly on the $y$ axis.