Answer:
the positive correlation between the number of hours spent practicing archery and the number of bull's-eyes the archer can hit
Step-by-step explanation:
Verified correct by K12 test.
by angle sum property in traingle having ,
$50+70+x=180 \implies x=60^{\circ}$
now, by exterior angle property of triangle, $x+y=60+50$
put $x=60$ to get $y=50$
Answer: A,C,D,F