Mr. Gardener invested $500,000. His annual interest was $40,000. What was the annual interest rate?
1 answer:
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Answer:
k = 4
Step-by-step explanation:
The graph represents y and x in direct proportion with equation
y = kx ← k is the constant of proportionality
To find k use the point (1, 4), that is x = 1, y = 4
k = =
= 4