So I'm learning a new thing and I don't understand it can someone help me?

Which inequality has a dashed boundary line when graphed ?

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.