Identify the values that should be tested to see if a change occurs

• x-values

• y-values

• h-values

• z-values

The values that should be tested to see if a change occurs is y-values

Explanation:

The x-values represented the independent variable and generally is the variable one controls and the y-values represented the dependent variable which varies when the x-values are modified, so the y-values are the ones that should be tested or measured.

Answer is the second one