Q. The price value, V, of a car that is t years old is given by V=f(t)=17000−3100t. Find the domain and range of f(t).
Identify Function Components: Identify the function and its components.Function: V=f(t)=17000−3100tThis equation shows how the value V of a car decreases over time t.
Determine Domain of f(t): Determine the domain of f(t). The domain of f(t) is all possible values of t for which the function is defined. Since t represents the age of the car in years, t must be a non-negative number (t≥0).
Calculate Zero Value Time: Calculate when the car's value reaches zero to find the upper limit of the domain.Set V=0 and solve for t:0=17000−3100t3100t=17000t=310017000t=5.48Since a car can't be a fraction of a year old in this context, round t down to the nearest whole number, t=5.
State Domain Limit: State the domain based on the calculation.The domain of f(t) is 0≤t≤5, as the car's value cannot be negative and the car is valued for up to 5 years.
Determine Range of f(t): Determine the range of f(t). The range of f(t) is the set of all possible values of V. From t=0 to t=5, the value of V decreases from 17000 to 0.
State Range Values: State the range based on the function's behavior.The range of f(t) is from 0 to 17000, as these are the maximum and minimum values V can take.
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