Can someone teach me how to solve question 1 and 2

Which linear inequality is represented by the graph? !

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 (%)

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "