What is the equation of the line that passes through the point (1,7) and is perpendicular to the graph of Y=-14X+11

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 will form a composite function?

2f(x)= x+3 if 4 < x < 8 2x if x 28 2