Is this a function or not a function
ANSWER ASAP

It is function

Step-by-step explanation:

Because x values are not repeating, it's a function. Compare your x values. If they have same number for more than 2 coordinates, that's not a function. If they don't have same number for more than 2 coordinates, that is a function.

answer:      

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4