Which table is Not a linear function?

explain to me please

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0