Heights (in centimeters) and weights (in kilograms) of 7 supermodels are given below. Find the regression equation, letting the first variable be the independent (x) variable, and predict the weight of a supermodel who is 171 cm tall.

Height: 176, 168, 178, 174, 176, 176, 178

Weight: 56, 50, 58, 55, 54, 55, 57