A new iPhone is estimated to lose 25% of its value every six months after its purchase. How much is the value of an iPhone that costs $799 after someone has owned it for two years? (Round to the nearest cent. Two decimal places.) *

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  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

-1/2 +2

step-by-step explanation: