What is the equation in standard form of the line which passes through (-2, 6) and has a slope of -1?

Can any one me with the answers to these questions asap?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!