anonymous
  • anonymous
Can someone pls tell me whether the graphs of the lines will be collinear, parallel, or intersecting? y= 4x+1 y=4x-3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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jim_thompson5910
  • jim_thompson5910
What are the slopes of each line?
anonymous
  • anonymous
intersecting
anonymous
  • anonymous
why?

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More answers

jim_thompson5910
  • jim_thompson5910
no, the lines aren't intersecting
anonymous
  • anonymous
I just need the explaination of the formula to tell whether or not it is parallel or intersecting and col linear
jim_thompson5910
  • jim_thompson5910
What are the slopes of each line?
anonymous
  • anonymous
thats all it is given, theres a formula for solving but I don't know it.
jim_thompson5910
  • jim_thompson5910
Hint: the equation y = mx+b has the slope m
jim_thompson5910
  • jim_thompson5910
ex: y = 9x + 20 has the slope of 9
anonymous
  • anonymous
sorry the lines are not intersecting. Extremely sorry, I made a mistake. They have same slopes, so they should be parallel.
anonymous
  • anonymous
I guess its four right? thats fine
jim_thompson5910
  • jim_thompson5910
4 is the slope, yes
jim_thompson5910
  • jim_thompson5910
since the slope is 4 for both of the lines, the lines are either parallel or collinear
jim_thompson5910
  • jim_thompson5910
the two lines are collinear if and only if the two y-intercepts are the same
jim_thompson5910
  • jim_thompson5910
otherwise, the two lines are parallel
anonymous
  • anonymous
ah ok
anonymous
  • anonymous
one passes from y=-3 and other from y=1, so they are parallel(since slopes are same) but not co-linear.
anonymous
  • anonymous
so if its the same its parallel and what happens if its collinear?
jim_thompson5910
  • jim_thompson5910
no, if the y-intercepts are the same, the lines are collinear if the y-intercepts are different, the lines are parallel both cases are true when the slopes are both equal
anonymous
  • anonymous
oh ok i see, so it is collinear right?
jim_thompson5910
  • jim_thompson5910
what are the y-intercepts for both lines?
anonymous
  • anonymous
i need help finding the y intercepts pls
jim_thompson5910
  • jim_thompson5910
y = mx+b b is the y-intercept ------------------------------ ex: for y = 2x+11 11 is the y-intercept ------------------------------ ex: y = 14x-13 which is the same as y = 14x + (-13) -13 is the y-intercept
anonymous
  • anonymous
ah i see
anonymous
  • anonymous
in this case the y intercepts are the same, which is 4x? And what do I do with the 1 and -3?
anonymous
  • anonymous
to find Y=intercept, put x=0 in each equation. simple. Any point on y-axis is represented as x=0 and y=Y
jim_thompson5910
  • jim_thompson5910
no, that's not the y-intercept
jim_thompson5910
  • jim_thompson5910
y = 4x + 1, y intercept is 1
jim_thompson5910
  • jim_thompson5910
look back up at my 2nd to last post
anonymous
  • anonymous
oh right then the y intercepts aren't the same
jim_thompson5910
  • jim_thompson5910
so the lines are parallel
anonymous
  • anonymous
ah ok what will happen if its intersecting?
jim_thompson5910
  • jim_thompson5910
if the slopes are different, then the lines will intersect
anonymous
  • anonymous
what about collinear?
jim_thompson5910
  • jim_thompson5910
if the slopes are the same and the y-intercepts are the same, then the two lines are collinear
anonymous
  • anonymous
ah coolio thanks

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