Answer:
a) v = -t + 11 . . . . . . v = value in thousands; t = years
b) in year 0, the value is about 11,000; the decrease is about 1,000 per year.
Step-by-step explanation:
a) The line on the graph appears to go through the points (1, 10) and (10, 1). Then the slope ∆y/∆x is (1-10)/(10-1) = -9/9 = -1. The point 1 unit up and 1 unit left of the point (1, 10) is (0, 11), the y-intercept. Using v (value, in thousands) for the vertical variable and t (time, in years) for the horizontal variable, the equation is ...
v = -t + 11
b) The y-intercept is the initial value: 11,000. The slope is the decrease per year: 1,000 per year.
