Round 3308.89 to the nearest australian dollar

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

I’m really confused and need your assist me with this question i’ve never been taught