A tank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. The values in the table show the volume

If

(f) Estimate the slope of the tangent line at

NOTE: It turns out that the slope of the tangent line is approximately -33.3 (Can you verify that?).

(a)

(b)

(c)

(d)

(e)

(f)

You can earn partial credit on this problem.