Answer
Slope = ∞
Explanation
For a straight line, the slope of the line can be obtained when the coordinates of two points on the line are known. If the coordinates are (x₁, y₁) and (x₂, y₂), the slope is given as
[tex]Slope=m=\frac{Change\text{ in y}}{Change\text{ in x}}=\frac{y_2-y_1}{x_2-x_1}[/tex]For this question,
(x₁, y₁) and (x₂, y₂) are (3, -1) and (3, 4)
[tex]\text{Slope = }\frac{4-(-1)}{3-3}=\frac{4+1}{0}=\frac{5}{0}=\infty[/tex]Hope this Helps!!!