The heights and weights of elephants at the zoo are recorded in the table.


Height (in feet) 5 6 7 7 8.5 9
Weight (in tons) 1.25 1.9 2.5 2.1 2.3 3.4
Interpret the slope, using the equation for the line of best fit.
ŷ = 0.747x − 0.422; for every additional foot in height, the elephant is predicted to gain 0.747 tons of weight
ŷ = 0.747x − 0.422; for every additional foot in height, the elephant is predicted to lose 0.422 tons of weight
ŷ = 0.422x − 0.747; for every additional foot in height, the elephant is predicted to lose 0.747 tons of weight
ŷ = 0.422x − 0.747; for every additional foot in height, the elephant is predicted to gain 0.422 tons of weight