I keep getting this wrong, pls help :(

What is this equation in point-slope form?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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 (%)