Line CD passes through points C(1,3) and D(4,-3). What is the equation of line CD in standard form?

Point a (7,3) is translated to a'(16,-9). which rule describes the translation?

You work for a landscape company that just got a contract to re-mulch a park. the area that needs mulching is 30 feet by 60 feet. they want a 3 inch layer of much on the area. the company has bags of mulch that cover 2 cubic yards that cost $4.00 per bag. how much will it cost the consumer just in materials to re-mulch the area (round to the nearest dollar)?

On questions #8 and #9 don't mind my answers they're probably wrong.