Happy birthday jisung

Which of the following lists of ordered pairs is a function?

To create an illustration of perspective, this artist did all of the following except 1) show clear orthogonal lines 2) have an implied vanishing point 3) distort proportion to keep the background and foreground the same size 4) include value changes between the foreground and background i was thinking maybe 1

Why was european renaissance important? a it was a time of great achievement in medicine. b it was a time of cultural and artistic achievement. c there were many great wars. d it was a time of great culinary achievement.