Answer:
see the procedure
Step-by-step explanation:
we have
[tex]c=2.95g[/tex]
where
c -----> the cost in dollars
g ----> the number gallons of gas purchased
1) For g=1 gal
substitute the value of g in the equation and solve for c
[tex]c=2.95(1)[/tex]
[tex]c=\$2.95[/tex]
The pair (1,2.95) fit the relationship
2) For g=3 gal
substitute the value of g in the equation and solve for c
[tex]c=2.95(3)[/tex]
[tex]c=\$8.85[/tex]
The pair (3,8.85) fit the relationship
3) For g=5 gal
substitute the value of g in the equation and solve for c
[tex]c=2.95(5)[/tex]
[tex]c=\$14.75[/tex]
The pair (5,14.75) fit the relationship
4) For c=$20.65
substitute the value of c in the equation and solve for g
[tex]20.65=2.95g[/tex]
[tex]g=20.65/2.95[/tex]
[tex]g=7\ gal[/tex]
The pair (7,20.65) fit the relationship