Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y varies directly with x. When x = 0.7, then y = 3.5.
A. k = 2.8; y = x + 2.8
B. k = 0.2; y = 0.2x
C. k = 0.7; y = 0.7x
D. k = 5; y = 5x
Answer: D
Mathematics
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A. increasing B. constant C. decreasing
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Perform the indicated operation. Write the answer in scientific notation.(7.52 × 10-6)(4.09 × 10-4)
A. 3.08 × 10-9 B. 3.08 × 1024 C. 3.1 × 10-9 D. 3.1 × 1024
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Find the derivative of the function.y = 
A. 
B. 
C. 
D. 
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