Find the slope-intercept equation of the line with m = 3/4 and b = 4

The given equations are
[tex]\begin{gathered} x=5 \\ \\ y=-6 \end{gathered}[/tex]x = 5 is represented by a vertical line as all points on the line have x-coordinate = 5
y = -6 is represented by a horizontal line as all the points on it have y-coordinate = -6
The vertical line and the horizontal line will form a right angle when intersected at the point (5, -6)
Then the two lines are perpendicular
The answer is the 2nd option