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Ginger Moore
rd
3
Period Algebra (8-3)
Caroline and her friends want to go to the
fair. If a fair pass cost $29.99 a piece, how
much will it cost if 6 of her friends want to go
to the fair with her?



y=$29.99
or
f(x)=29.99x
x= the number of fair passes needed
y= the total cost
* Don’t forget to include Caroline’s pass ! *

My independent variable is the number of
fair passes (represented as x)

My dependant variable is the total cost
(represented as y)
I know y DEPENDS x
so,
The total cost DEPENDS on the number of fair passes
X
29.99x
Y
(x , y)
1
29.99(1)
( 1, 29.99)
2
29.99(2)
( 2, 59.98)
3
29.99(3)
( 3, 89.97)
4
29.99(4)
( 4, 119.96)
5
29.99(5)
( 5, 149.95)
6
29.99(6)
( 6, 179.94)
7
29.99(7)
( 7, 209.93)
D:{ 1, 2, 3, 4, 5, 6, 7 }
R:{ 29.99, 53.98, 80.97, 107.96,
134.95, 161.94, 188.93
Our domain is Continuous.
Why? Our X value increases as the
Y value increases.
Domain: group or set of numbers
that goes into the function (X
values)
Range:set of numbers comes out of
function (Y values)
f(x)
-orThe number of passes needed
times the price of the cost of one
pass.
Caroline and her friends will need
the grand total cost of $188.93 for
all of them to go to the fair with a
fair pass.