SOLUTION: what is the equation of a line with a slope of -2/3 and y- intercept of 17

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Question 150897: what is the equation of a line with a slope of -2/3 and y- intercept of 17
Found 2 solutions by jim_thompson5910, stanbon:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If an equation has a y-intercept of 17, this means that the equation goes through the point (0,17)


If you want to find the equation of line with a given a slope of -2%2F3 which goes through the point (0,17), 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-17=%28-2%2F3%29%28x-0%29 Plug in m=-2%2F3, x%5B1%5D=0, and y%5B1%5D=17 (these values are given)


y-17=%28-2%2F3%29x%2B%28-2%2F3%29%28-0%29 Distribute -2%2F3

y-17=%28-2%2F3%29x%2B0 Multiply -2%2F3 and -0 to get 0

y=%28-2%2F3%29x%2B0%2B17 Add 17 to both sides to isolate y

y=%28-2%2F3%29x%2B17 Combine like terms 0 and 17 to get 17
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Answer:


So the equation of the line with a slope of -2%2F3 which goes through the point (0,17) is:

y=%28-2%2F3%29x%2B17 which is now in y=mx%2Bb form where the slope is m=-2%2F3 and the y-intercept is b=17

Notice if we graph the equation y=%28-2%2F3%29x%2B17 and plot the point (0,17), we get (note: if you need help with graphing, check out this solver)

Graph of y=%28-2%2F3%29x%2B17 through the point (0,17)
and we can see that the point lies on the line. Since we know the equation has a slope of -2%2F3 and goes through the point (0,17), this verifies our answer.

Answer by
stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
what is the equation of a line with a slope of -2/3 and y- intercept of 17
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Y = (-2/3)x + 17
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Cheers,
Stan H.