A sample of a radioactive isotope had an initial mass of 450 mg in the year 2005 and decays exponentially over time. A measureme
1 answer:
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Answer:
A
Step-by-step explanation:
Calculate the slope m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (- 4, 2) and (x₂, y₂ ) = (3, 9)
m = =
= 1 → A