The scatter plot shows the number of students per class al monida middle school and the number of magazine subscription each class sold for a fund raiser. about how many subscription did the class of 30 students sell

For this case, the first thing to do is to observe the value that the function takes on the axis y, when on the x axis we have 30 students.
 We have then:
 For x = 30:
 The value of y is given by:
 y = 175 (approximately)
 
 y = 175 subscriptions