Which set of ordered pairs represents a function? {(2, –2), (1, 5), (–2, 2), (1, –3), (8, –1)} {(3, –1), (7, 1), (–6, –1), (9, 1), (2, –1)} {(6, 8), (5, 2), (–2, –5), (1, –3), (–2, 9)} {(–3, 1), (6, 3), (–3, 2), (–3, –3), (1, –1)}

The second set represents a function since it has its own unique domain.

Remember  the x value should not repeat. Here we have -2 repeating -3 is repeating and 1 is repeating. Actually many numbers are repeating in the x value. Let me tell you a way to remember this. 

Lets say that the x value are students, and the y value are their height. 
so the x value is : Jennifer, Annie, Jake and Parcy
You can say that Jennifer is 1.66 m and Parcy is 1.66m. You see what I did there, the y variable is the same. But because the x variable is different, this is a function. 

However, I can't say that Jennifer is 1.66 and 1.52 m. That wouldn't make sense, she can't be both. 

Anyways, the answer to your question is No, the ordered pairs do not make a function. 

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct