anonymous
  • anonymous
Can someone please help will medal and fan! A. Describe the difference between 0 slope and undefined slope and give an example of each. B. Describe the different uses for the slope intercept form, the point slope form and the standard form and give examples of each. C. Describe how to determine if two lines are parallel, perpendicular or neither and give examples of each.
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
if a line has a slope of 0, then the line is horizontal |dw:1449710312935:dw|
jim_thompson5910
  • jim_thompson5910
if the slope is undefined, then the line is completely vertical |dw:1449710352524:dw|
anonymous
  • anonymous
and undefined slopes don't exist right?

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anonymous
  • anonymous
ohhhh
anonymous
  • anonymous
ok
anonymous
  • anonymous
can you help me with b and c please
anonymous
  • anonymous
@jim_thompson5910 r u there?
jim_thompson5910
  • jim_thompson5910
sorry the website is being laggy on my end, one moment
anonymous
  • anonymous
Okay its ok take your time :)
jim_thompson5910
  • jim_thompson5910
how far did you get with part b) ?
anonymous
  • anonymous
oh i don't really understand these three questions thats why i came here for help :)
jim_thompson5910
  • jim_thompson5910
do you have in your notes `slope intercept form` ?
anonymous
  • anonymous
y = mx + b
jim_thompson5910
  • jim_thompson5910
what does m and b represent?
anonymous
  • anonymous
m is the slope and b is the y intercept
jim_thompson5910
  • jim_thompson5910
yep
jim_thompson5910
  • jim_thompson5910
so if you know the slope and y intercept, you can form the equation or you can go in reverse if you know the equation, you can find the slope and y intercept
anonymous
  • anonymous
ya
jim_thompson5910
  • jim_thompson5910
what is point slope form?
anonymous
  • anonymous
y - k = m(x - h)
anonymous
  • anonymous
m is the slope and h,k is a point on the line
jim_thompson5910
  • jim_thompson5910
or you can write it as \[\Large y - y_1 = m(x - x_1)\] but you pretty much have it
anonymous
  • anonymous
oh ok
jim_thompson5910
  • jim_thompson5910
your way is probably better/easier to write on a keyboard
anonymous
  • anonymous
ya
jim_thompson5910
  • jim_thompson5910
what is one advantage of point slope form?
anonymous
  • anonymous
its an easy way of finding a line equation with two points
jim_thompson5910
  • jim_thompson5910
yes, you can find the slope of the line through those two points then you can use point slope form to plug in the slope m and one of the points (h,k)
anonymous
  • anonymous
so thats my answer for b right?
jim_thompson5910
  • jim_thompson5910
you just need to go over standard form and then you're done with part b
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
um i think standard form is like 10 to the power of 3 = 1000 right?
jim_thompson5910
  • jim_thompson5910
standard form, in terms of a linear equation is this Ax + By = C hopefully that looks familiar?
anonymous
  • anonymous
oh yea x,y is the point and A B C are the integers
jim_thompson5910
  • jim_thompson5910
yes (x,y) is on the line
anonymous
  • anonymous
ya
anonymous
  • anonymous
and how do we use standard form?
jim_thompson5910
  • jim_thompson5910
standard form is useful for helping to find x and y intercepts you just plug in x = 0 to find the y intercept or plug in y = 0 to find the x intercept
anonymous
  • anonymous
ohh ok
anonymous
  • anonymous
and C i'm not sure about because like are they asking about normal lines or...
jim_thompson5910
  • jim_thompson5910
if two lines are parallel, what must be true of their slopes?
anonymous
  • anonymous
its not a function......
anonymous
  • anonymous
i don't know
jim_thompson5910
  • jim_thompson5910
the slopes would be equal
jim_thompson5910
  • jim_thompson5910
example y = 2x+7 y = 2x+9 both slopes are 2. If you graphed the two equations, you'll find that they never cross
anonymous
  • anonymous
ohhh ok
jim_thompson5910
  • jim_thompson5910
if two lines are perpendicular, then the two slopes will multiply to -1 example y = 3x+5 y = -1/3x + 10 3 times -1/3 = -1, so these two lines are perpendicular. They meet at a 90 degree angle
anonymous
  • anonymous
ok
anonymous
  • anonymous
and i think we're done now right?
jim_thompson5910
  • jim_thompson5910
yes I think that covers it all
anonymous
  • anonymous
oh good thank you soo much :)
jim_thompson5910
  • jim_thompson5910
no problem

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