SOLUTION: Find the y-intercept and the x-intercept for the equation -8x + y = 28 -8(0) + y= 28 Y=28 Y intercept is (0,28) -8x + 0 =28 -8x = 28 X intercept is (-2/7,0) or (-4/14,0)??

Algebra ->  Graphs -> SOLUTION: Find the y-intercept and the x-intercept for the equation -8x + y = 28 -8(0) + y= 28 Y=28 Y intercept is (0,28) -8x + 0 =28 -8x = 28 X intercept is (-2/7,0) or (-4/14,0)??      Log On


   

Question 199792This question is from textbook
: Find the y-intercept and the x-intercept for the equation
-8x + y = 28
-8(0) + y= 28
Y=28
Y intercept is (0,28)
-8x + 0 =28
-8x = 28
X intercept is (-2/7,0) or (-4/14,0)????
Can you help me which answer is right and why?
Thank you! This question is from textbook

Found 2 solutions by solver91311, jim_thompson5910:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


They are both right in the sense that both and (or even for that matter) describe the exact same point in . However, the one with the coordinates reduced to the lowest terms is generally preferable.

John

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

x-intercept


To find the x-intercept, plug in y=0 and solve for x


-8x%2By=28 Start with the given equation.


-8x%2B0=28 Plug in y=0.


-8x=28 Simplify.


x=%2828%29%2F%28-8%29 Divide both sides by -8 to isolate x.


x=-7%2F2 Reduce.


So the x-intercept is .


------------------------------------------


y-intercept


To find the y-intercept, plug in x=0 and solve for y


-8x%2By=28 Start with the given equation.


-8%280%29%2By=28 Plug in x=0.


-0%2By=28 Multiply -8 and 0 to get 0.


y=28 Simplify.


So the y-intercept is .



If you have any questions, email me at jim_thompson5910@hotmail.com.
Check out my website if you are interested in tutoring.