Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ The table shows data that Alex gathered about her classmates:

Student Measurements:
- Weight, in kg; Height, in cm
- 152, 63
- 154, 65
- 150, 66
- 157, 66
- 146, 61

She determined that the data defined a function. Which action would cause Alex's set of ordered pairs to no longer define a function?

1. Adding data from a student who is 161 cm tall and weighs 63 kg
2. Adding data from a student who is 154 cm tall and weighs 69 kg
3. Converting the measurements from metric units to inches and pounds
4. Plotting the data on a coordinate grid

A function is defined as a relationship between two sets of numbers, such that each input has exactly one output. In this case, Alex's set of ordered pairs defines a function because each input, which is the height, has exactly one output, which is the weight.

However, if Alex were to add data from a student who is 154 cm tall and weighs 69 kg, this would create a duplicate input (height) with different outputs (weights). This violates the definition of a function, as each input should have exactly one output. Therefore, option 2) would cause Alex's set of ordered pairs to no longer define a function.