What is consistent???

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

What does the sign of the slope tell you about a line?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract