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 final cost of teeth whitening will vary, depending on the type of whitening you choose, your dentist, the duration of your treatment, and more. Average Costs The type of whitening is the biggest factor when it comes to calculating the cost of your treatment. 1  Over-the-counter treatments typically range from $5 to $50. Although these methods are the cheapest form of whitening, they are also the least effective. 2  Take-home treatments typically cost between $200 and $400.