Table 5: PW relations for fundamental pulsators with iron content in the range of [Fe/H] = -2.6 to -0.7 and period $P\le $ 8 days.
W=a+b log  $P_{\rm F}+c$[Fe/H] $+\;d(l/H_{\rm p}-1.5)$
W a b c d
${\it WVR}$ -1.07 $\pm$ 0.07 -2.42 $\pm$ 0.02 +0.01 $\pm$ 0.01 -0.10
${\it WVI}$ -1.16 $\pm$ 0.07 -2.43 $\pm$ 0.02 +0.04 $\pm$ 0.01 -0.10
${\it WVJ}$ -1.04 $\pm$ 0.06 -2.37 $\pm$ 0.02 +0.05 $\pm$ 0.01 -0.08
${\it WVH}$ -1.20 $\pm$ 0.06 -2.58 $\pm$ 0.02 +0.06 $\pm$ 0.01 -0.07
${\it WVK}$ -1.13 $\pm$ 0.06 -2.52 $\pm$ 0.02 +0.06 $\pm$ 0.01 -0.06
$\it WJK$ -1.15 $\pm$ 0.06 -2.60 $\pm$ 0.02 +0.06 $\pm$ 0.01 -0.06

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