The data set represents a month-to-month progression of gasoline prices over the course of several months in an
unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set.
0
2. 3 4
5
у 1.30 1.34 1.38 2.20 2.88 2.24
х
1
a
b
y=-0.01572 +0.365x+1.116
y = 0.01572 -0.365x + 1.116
cy=-0.0157° +0 0365x+1.116
d y=-0.0157° +0.365x-1116

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

related questions

all it means is function 3

b

step-by-step explanation:

the ordered pairs for the given function are of the form