Which relation is a function? {(a, 1), (b, 1), (C, 1)}
O {(a, a),(a, b), (a, c)}
O {(a, 1), (6, 1),(a, c)}
{(a, a),(b, b),(a, c)}

{(a, 1),(b, 1),(c, 1)}

Step-by-step explanation:

Each x-value needs to have only one y-value in order to be a function

answer is:

1.75 pounds

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