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Identify which of the following are examples of y as function of x, and give a...

Identify which of the following are examples of y as function of x, and give a brief explanation either analytically or graphically. For those that are not functions provide a specific value of x where two or more values of y can be assigned.

a. 3x2-y=5

b. X2+y2=4

c. Y=5e-3x

d. X=√Y-1

Math   Calculus   
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