Answer:
C: ST
Step-by-step explanation:
Perpendicular Lines
The four points R(-5, 3), S(-5, 4), T(-3, 4), and U(-3, 1) are shown in the image attached below.
The vertical line TU is also shown. The only possible line perpendicular to TU is ST because it's a horizontal line.
Horizontal lines have a slope of 0. Let's verify the slope between points S(-5,4) and T(-3,4):
[tex]\displaystyle m=\frac{4-4}{-3+5}=\frac{0}{2}=0[/tex]
Once verified, the answer is C: ST
