The value of Ziyana's smart phone, $V hundreds, loses value at a rate of $150 per year ager she bought it for $900. (a) Write down the formula for the value of the smart phone $V after x years
Answers
Given : The value of Ziyana's smart phone, $V hundreds, loses value at a rate of $150 per year ager she bought it for $900.
To Find : (a) Write down the formula for the value of the smart phone $V after x years
Solution:
Phone bought for $900.
Initial value = 900
, loses value at a rate of $150 per year
Rate = slope = - 150
Hence V = 900 - 150x
V = 900 - 150x $
But V is given in hundreds,
Hence V = (900 - 150x)/100
=>V = 9 - 1.5x value in Hundred $
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