SOLUTION: a line with slope 305and y-intercept (0,4) 9

Algebra ->  Linear-equations -> SOLUTION: a line with slope 305and y-intercept (0,4) 9      Log On


   



Question 119522: a line with slope 305and y-intercept (0,4)











9

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Is the slope supposed to say "3/5"?




If you want to find the equation of line with a given a slope of 3%2F5 which goes through the point (0,4), 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=%283%2F5%29%28x-0%29 Plug in m=3%2F5, x%5B1%5D=0, and y%5B1%5D=4 (these values are given)


y-4=%283%2F5%29x%2B%283%2F5%29%28-0%29 Distribute 3%2F5

y-4=%283%2F5%29x%2B0 Multiply 3%2F5 and -0 to get 0

y=%283%2F5%29x%2B0%2B4 Add 4 to both sides to isolate y

y=%283%2F5%29x%2B4 Combine like terms 0 and 4 to get 4
------------------------------------------------------------------------------------------------------------
Answer:


So the equation of the line with a slope of 3%2F5 which goes through the point (0,4) is:

y=%283%2F5%29x%2B4 which is now in y=mx%2Bb form where the slope is m=3%2F5 and the y-intercept is b=4

Notice if we graph the equation y=%283%2F5%29x%2B4 and plot the point (0,4), we get (note: if you need help with graphing, check out this solver)

Graph of y=%283%2F5%29x%2B4 through the point (0,4)
and we can see that the point lies on the line. Since we know the equation has a slope of 3%2F5 and goes through the point (0,4), this verifies our answer.