Step-by-step explanationStep 1
find the equation of the line that passes through the points (-3, 0) and (-3 ,5)
a) find the slope of the line
the slope of a line is given by:

then, Let
P1(-3,0)
P2(-3,5)
replace
![\begin{gathered} \text{slope}=(y_2-y_1)/(x_2-x_1) \\ slope=(5-0)/(-3-(-3))=(5)/(0)=\text{indefined}\Rightarrow vertical\text{ line} \end{gathered}]()
therefore, the line is a vertical line
Step 2
now, to find the point where the line intersects the x-axis, check the x coomponent of any coordinate of the line,
so

we need to draw a dashed vertical line that passes through and then, shaded the left zone, so
Inequalities that use < or > symbols are plotted with a dashed line to show that the line is not included in the region
therefore, the dashed zone represents all the x values smaller than -3

I hope this helps you