Posted by Sharday on Tuesday, November 1, 2011 at 2:59am.
Write the equation for this situation: the value, v, in hundreds of dollars, of Bob’s stamp collection is 12 dollars more than 1/3 of the age, t (in years).
Then graph the equation and use the graph to determine the value of Bob’s coin collection if it is 9 years old.
Please show all of your work.

algebra  Jai, Tuesday, November 1, 2011 at 5:12am
v = (1/3)t + 12
to plot this, the easiest way (for me) is to get the x and yintercept (in this case, the xaxis = taxis, and yaxis = vaxis).
to get tintercept, we let v = 0 and solve for t:
v = (1/3)t + 12
0 = (1/3)t + 12
(1/3)t = 12
t = 36
thus tintercept is at (36, 0)
to get vintercept, we let t = 0 and solve for v:
v = (1/3)t + 12
v = 12
thus vintercept is at (0, 12).
to plot, locate these points. connect them, and extend on both ends. you must plot this accurately since you need to find the value of v at t = 9.
hope this helps~ :)
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