HELP PL ASAP ASAP I NEED HELPP which set of ordered pairs represents a function?

A {(-2,5), (6,9), (8,-4), (8,7)}
B{(-1,4),(-5,-2), (6,1),(-2,-2)}
C {(-5, -6),(-5,3), (-7, -8),(-1, -9)}
D{(-8,-4),(-8,-5),(-6, -1), (3,6)}

Only set B

Step-by-step explanation:

Look for pairs (x, y) in the set, where the x value is NOT repeated connecting it with a different y value. The only one like that is set B.

All other sets have repeated x values in their pairs: (8, -4), (8, 7)

(-5,-6) (-5, 3)

and (-8,-4) (-8,-5)

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925