Which represents a function

Jo earned $4378 by selling doughnuts for two dollars each. If she sold 978 chocolate doughnuts and all the other doughnuts she sold were plain how many plain doughnuts did she sell?

A family's phone number qualifies what kind of data

Log 3x = 4 how do you cancel out the log?

what is 27% of 117?

9.254 times 1000 = what is answer

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.