question: private String rateLabels2RelativeValues ( String rateAttribute ) { if ( rateAttribute . equals ( "x-slow" ) ) { return "-50%" ; } else if ( rateAttribute . equals ( "slow" ) ) { return "-33.3%" ; } else if ( rateAttribute . equals ( "medium" ) ) { return "+0%" ; } else if ( rateAttribute . equals ( "fast" ) ) { return "+33%" ; } else if ( rateAttribute . equals ( "x-fast" ) ) { return "+100%" ; } return "+0%" ; }
target:  a look-up table for mapping rate labels to relative values