Please help mee Which graph shows a set of ordered pairs that represent a function?

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?

X+ 4y − z = −14 5x + 6y + 3z = 4 −2x + 7y + 2z = −17

Aarti posted a comment on her blog. each day the number of responses to her comment was 125% of the number she received on the previous day. if there were 64 responses the first day, how many were there on the fourth day?