Is 56+y2=100 equation(with variable) give reason​

This is different from the first one can someone me

Elizabeth is using a sample to study american alligators. she plots the lengths of their tails against their total lengths to find the relationship between the two attributes. which point is an outlier in this data set?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?