Hooke's Law states that if a weight w is attached to a hanging spring, then the stretched length s of the spring is linearly related to w. For a particular spring we have s = 0.3w + 2.5 where s is measured in inches and w in pounds.

(a) What do the slope and s-intercept in this equation represent? (b) How long is the spring when a 5 lb weight is attached?