SOLUTION: The budget deficit for the city of Gotham can be modeled by the equation D = 1.2n + 13.5 where n is the number of years since 1990 and D is the deficit in millions of dollars. c

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Question 149775: The budget deficit for the city of Gotham can be modeled by the equation
D = 1.2n + 13.5 where n is the number of years since 1990 and D is the deficit in millions of dollars.
correctly display the graph of the equation?
Answer by nerdybill(7384) About Me  (Show Source):
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The budget deficit for the city of Gotham can be modeled by the equation
D = 1.2n + 13.5 where n is the number of years since 1990 and D is the deficit in millions of dollars. correctly display the graph of the equation?
.
The equation given:
D = 1.2n + 13.5
is an equation of a straight line where the y-axis represents the deficit (D) while the x-axis represents "number of years since 1990" (n).
.
The equation is in the "slope intercept" form of a line:
y = mx + b
where
y is 'D' -- representing deficit
m is the slope (given as 1.2 or in fraction 6/5)
b is the y-intercept at (0, 13.5)
.
This site explains, in detail, how to graph the line given the above information:
http://www.purplemath.com/modules/slopgrph2.htm
.
In general:
1. using graph paper, label the vertical axis as D and the horizontal axis as n
2. place dot at the y-intercept at (D,n)=(0, 13.5)
3. From the dot (above), using the slope now, go UP (because it's +6) 6 units and then go RIGHT (because it's +5) 5 units and place a second dot here.
4. finally, draw a line through the two lines and now, you're done.