is the following relation a function?

How to determine whether two known pairs of points are on the same line.

There's a big ski event at the south pole to show off her mad skiing skills a pretty yeti name betty wants to rent some penguins skis but she doesn't want to spend more than 150 fish dollars for the rental normally the rental fee for penguin skis is 225 fish dollars. but today there's a special offer 45% discount tax 8% after discount what is the percent difference between the original price she wants to spend in the special offer for today

The label on the cars antifreeze container claims to protect the car between -30? c and 130? c. to convert celsius temperature to fahrenheit temperature, the formula is c=5/9(f-32). write and solve the inequality to determine the fahrenheit temperature range at which this antifreeze protects the car