Answer:
Relation 1 : Not a function
R2 : Function
R3: Function
R4: Not a function
Answer:

Step-by-step explanation:
Cost at the rate 6 for $15.24:
Cost of
bottles
Cost of
bottle
Cost of
bottles
Cost at the rate 4 for $11.16:
Cost of
bottles
Cost of
bottle
Cost of
bottles
Hence
is less expensive.
Total saving
ANSWER: $ 912 .
________________________________
Explanation:
_______________________________
75x + 12 = ?
_____________________
Substitute "12" for "x" ; to solve:
______________________________
75*(12) + 12 = 912 .
______________________________
Answer: $912.
______________________________
12, 24, or 26 is a common denominator