SOLUTION: Write the equation of the line that passes through point (6, 4) with a slope of 2.

Algebra ->  Linear-equations -> SOLUTION: Write the equation of the line that passes through point (6, 4) with a slope of 2.      Log On


   



Question 111348: Write the equation of the line that passes through point (6, 4) with a slope of 2.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

If you want to find the equation of line with a given a slope of 2 which goes through the point (6,4), you can simply use the point-slope formula to find the equation:


---Point-Slope Formula---
y-y%5B1%5D=m%28x-x%5B1%5D%29 where m is the slope, and is the given point

So lets use the Point-Slope Formula to find the equation of the line

y-4=%282%29%28x-6%29 Plug in m=2, x%5B1%5D=6, and y%5B1%5D=4 (these values are given)


y-4=2x%2B%282%29%28-6%29 Distribute 2

y-4=2x-12 Multiply 2 and -6 to get -12

y=2x-12%2B4 Add 4 to both sides to isolate y

y=2x-8 Combine like terms -12 and 4 to get -8
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Answer:


So the equation of the line with a slope of 2 which goes through the point (6,4) is:

y=2x-8 which is now in y=mx%2Bb form where the slope is m=2 and the y-intercept is b=-8

Notice if we graph the equation y=2x-8 and plot the point (6,4), we get (note: if you need help with graphing, check out this solver)

Graph of y=2x-8 through the point (6,4)
and we can see that the point lies on the line. Since we know the equation has a slope of 2 and goes through the point (6,4), this verifies our answer.