Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line. (Each pair of variables has a significant correlation.) Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. The caloric content and the sodium content (in milligrams) for 6 beef hot dogs are shown in the table below.

Calories,x	150	170	120	130	90	180		(a) x=160 calories	(b) x=100 calories
Sodium, y	420	470	350	360	250	520		(c) x=140 calories	(d) x=50 calories