A gas station charges $2.19 per gallon of gas. Use function notation to describe the relationship between the total cost c(g) and the number of gallons purchased g.
a.) c(g)=-2.19g
b.) g=2.19c(g)
c.) c(g)=g+2.19
d.) c(g)=2.19g

Question

A gas station charges $2.19 per gallon of gas. Use function notation to describe the relationship between the total cost c(g) and the number of gallons purchased g.
a.) c(g)=-2.19g
b.) g=2.19c(g)
c.) c(g)=g+2.19
d.) c(g)=2.19g

kayla2001 · Answer

@Nnesha  need help

kayla2001 · Answer

thanks im your biggest fan

nnesha · Answer

hmmm can u wait  ?? bec i really gtg

kayla2001 · Answer

but it is really important have to get done today plzzzzzzzzzzzzz

nnesha · Answer

okay so there is a key word per

kayla2001 · Answer

multiply

nnesha · Answer

okay answer me quickly i really gtg

nnesha · Answer

yeah 2.19 mean per 
which also mean slope right

kayla2001 · Answer

ye

nnesha · Answer

y = mx +B <---slope m which is always with x right

kayla2001 · Answer

yes I guess never done this before

nnesha · Answer

|dw:1421619403008:dw|

nnesha · Answer

in that example you can replace x by g

kayla2001 · Answer

ok

nnesha · Answer

so replace y by cost and m by slope 
remember 
2.19 per <-- so this is slope 
replace m by 2.19

kayla2001 · Answer

k

nnesha · Answer

so what should be ur answer

kayla2001 · Answer

c?

nnesha · Answer

|dw:1421619574087:dw|
here mx are multiplying not adding