Which set of ordered pairs does NOT represent y as a function of x?

{(1, 1), (2, 2), (2, 3)}

{(1, 2), (2, 3), (3, 3)}

{(1, 1), (2, 1), (3, 1)}

{(1, 2), (1, 3), (1, 1)}

Manny bought 12 pounds of vegetables at the supermarket. 75% of the vegetables were on sale. how many pounds of vegetables were not on sale? 98 points : )

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Will make ! for correct answer the dot plot below shows the number of toys 21 shops sold in an hour.is the median or the mean a better center for this data and why? a. median; because the data is not symmetric and there are outliersb. median; because the data is symmetric and there are no outliersc. mean; because the data is symmetric and there are no outliersd. mean; because the data is skewed and there are outliers