Why I'm getting an error the method is undefined below? And how to fix it?

Console x ParamReturnValue Practice [Java Application] /Applications/Eclipse.app/Contents/Eclipse/plugins/org.eclipse.justj.openj Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method averageArray(double[]) is undefined for the type ParamReturnValuePractice at ParamReturnValuePractice.main(ParamReturnValuePractice.java:71) 46 8 9 10 20 21 26 30 31 32 33 Project Explorer ParamReturnValue Practice.java x class PrintHelper extends Object 2 { 3 public double() getTemperatures() double temps = new double [7]; 7 temps [0] = 5.6; temps (1) = 2; 9 for (int i = 2; i