January 2024 Multiple Choice (Partial)

A cafeteria food manager studied the lunchtime eating habits of a group of employees in their office building. The purpose of the study was to determine the proportion of employees who purchased lunch in the cafeteria, brought their lunch from home, or purchased lunch from an outside vendor. This collection of data would best be classified as

• a census

• an experiment

• an observational study

• a simulation

Which graph has imaginary roots?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

• -5, only

• -3, 1 and 5

• -5 and 0

• -5, -3 and 0

• Graph 1

• Graph 2

• Graph 3

• Graph 4

• -1.9

• 0.3

• 5.1

• 21.3

• -x - 5

• -x + 5

• 3x - 5

• x + 5

• 1995

• 2013

• 2014

• 2018