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.
The cost depends on the type of treatment you have. As a rough guide, teeth whitening in general can cost from Â£300 up to Â£1,000 or more. Prices for individual procedures are as follows: Laser teeth whitening: from Â£700 to Â£1,300. BriteSmile whitening: from Â£500 to Â£700. Gel-Tray whitening: from Â£300 to Â£700. Enlighten deep bleaching: from Â£500. Zoom teeth whitening: from Â£200. Teeth whitening is not available on the NHS who see it along with cosmetic dentistry in general as a âlifestyleâ choice.