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 most cost effective way to whiten your teeth is with custom trays made by your dentist, and a dentist dispensed whitening kit. If this the first time you have whitened your teeth, this kit may cost between $300 and $500. Once you have the trays made, you have the tools to touch up your whitening for years to come. You can buy a refill kit of bleaching gel from your dentist for probably under $100.