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What is the rate of change of a line that passes through (2,-5) and (6,-2)?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5