no. the percentage of change can be a negative number as well as a positive number.
Answer:
If you have given an equation, you see the x and y in it. Just taking second equation and think any common factor between x's variable. With common factor, multiply both and you will find the value of y and put it in any equation, you will find the value of X.
310*0.3=93
93 students play an instrument.
I think the slope of the line would be -4/5