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.
Where You Can Find It. 1  The powder is available here and in-store (Leeds Corn Exchange). There are two sizes of the charcoal teeth whitening powder, to appeal to everyone: 2  30g is Â£9.99 â but on offer at Â£7.99 until 1 March! 3  15g is Â£6.99.