Answer:
9
Step-by-step explanation:
2 - 3 = -1 + 4 + 6 = 9
Before we go into this, here's the formula: (y2-y1)/(x2-x1)
Pair 1: RS TU
> Slope of RS = 2/3
> Slope of TU = 2/3
Since both slopes are they same, they are parallel.
Pair 2: RS ST
> Slope of RS = 2/3
> Slope of ST = -3/2
Since the slopes are negative reciprocals of each other, they are perpendicular.
Same goes for the last pair, which is TU ST.
> Slope of TU = 2/3
> Slope of ST = -3/2
They're negative reciprocals, hence they are perpendicular.
Hope this helps! :)
looks like F(x)= |x| for me.
