Answer with steps please?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Can you me find the slope! (30 points)