Need to be done asap

to make one cheese sandwich, tina uses one bread roll and two cheese slices.
pack of 15 bread rolls
£1.91
pack of 20 cheese slices
£2.23
she is going to buy enough packs to
have exactly twice as many cheese slices as bread rolls
make more than 100 cheese sandwiches.
work out the least amount she can spend.

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done