The slope of y=2x+1 is: 2. The parallel line needs to have the same slope of 2. We can solve it using the point-slope equation of a line: y â y1 = 2(x â x1) And then put in the point (5,4): y â 4 = 2(x â 5) And that answer is OK, but let's also put it in y = mx + b form: y â 4 = 2x â 10.
1 In-office teeth whitening treatments by a dentist can cost $300-$1,000 or more, but average about $500-$700.
There are various in-office teeth whitening options to choose from (Zoom whitening, Britesmile, Lumibrite, Opalescence, etc.), each of which ranges somewhat in price. Costs for in-office treatment may also depend on the dentist performing the treatment. That said, the national average cost of in-office teeth whitening is approximately $650. Teeth Whitening Costs and Insurance, and Maintaining Results. It is uncommon for teeth whitening to be covered by any sort of dental insurance policy.