Final answer:
To express the value of an MRI machine over time as a linear equation, you would use the formula y = V0 - Dt, where V0 is the initial value and D is the depreciation rate. The exact equation requires the specific values for the initial cost and annual depreciation.
Step-by-step explanation:
To write a linear equation that describes the value y (in dollars) of an MRI machine in terms of the time t (in years), you need two key pieces of information: the initial value of the machine (the y-intercept) and the rate of depreciation (the slope).
Let's assume the initial value of the MRI machine (when t = 0) is V0 dollars, and the machine depreciates at a constant rate of D dollars per year. The linear equation would then be y = V0 - Dt.
Without specific numbers for V0 and D, we cannot give an exact equation. However, assuming that V0 is the y-intercept and -D is the slope of the line representing depreciation per year, the equation aligns with the standard format for a linear equation, y = mx + b, where m is the slope and b is the y-intercept.