MRS RANDOLPH bought a used car in 2004. In 2007 the car was worth 9500 and in 2010 the car was valued at $4000. express the Value,V, of Mrs.
Randolph's car in terms of, t, the number of years she has owned it.

a)compute the slope of the graph
b) write an equation for v in terms of t

Question

MRS RANDOLPH bought a used car in 2004. In 2007 the car was worth 9500 and in 2010 the car was valued at $4000. express the Value,V, of Mrs. 
Randolph's car in terms of, t, the number of years she has owned it.

a)compute the slope of the graph
b) write an equation for v  in terms of t

whpalmer4 · Answer

You've got two points, (2007, 9500) and (2010, 4000).  Find the slope with 
$$m = \frac{y_2-y_1}{x_2-x_1}$$

Then use the formula for a line given slope and a known point:
$$y - y_0 = m(x-x_0)$$
Use t and v instead of x and y

kropot72 · Answer

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kropot72 · Answer

The two 'given' points on the graph are (3, 9500) and (6, 4000)
The slope is given by
$$slope=\frac{V _{1}-V _{2}}{t _{1}-t _{2}}$$

whpalmer4 · Answer

Yeah, sorry, I didn't convert to years of ownership.