It's supposed to be Triangle ZXY but it isnt in the choices.
<span>6.4u−5.1u=−3.25
Simplify
1.3u = -3.25
Divide both sides by 1.3
1.3u/1.3 = -3.25/1.3
Simplify
u = -2.5</span>
15 is the answer, I think.

The line is solid which makes the iniquity Greater than.
The shaded area is above the line so it would be greater than the slopes.
Hope this was clear :)