Twice the difference of a number and 7 is at least 18

Aline passes through 3,7 and 6,9 what equation represents the line

Which linear inequality is represented by the graph?

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?