What is the verbal expression for 3x/7

Which table represents a linear function? i'll give brainliest to first answer ^'^

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?

Which of the following parabolas opens up?