Asked by Paws

Can you help me?
I have this question:
Find the equation of the line given the following information:
m=UD, x=3.
And I have to find the equation.

Then it says:
Identify the slope and y intercept from the following equations:
x=5, m=___, b=___
I also have to graph it.

But I don't understand how to do this if the slope is UD!
Help me!
Answered by Reiny
equation is

y = (UD)x + b

Until you reveal more information about this mysterious UD , that's all I can give you.
Answered by Paws
UD is undefined...
Answered by Reiny
Ok, then ....

If the slope is undefined, you have a vertical line.
All vertical lines can be defined only by their x value.
since x = 3
the equation of your line is x = 3

Furthermore, if the slope is undefined, that is, if the line is vertical it CANNOT be written in the form
y = mx + b
A vertical line cannot have a y-intercept, unless it is the y-axis itself, namely x = 0

if x = 5, that becomes your equation of that vertical line.
To graph it, use (5,0) on the x-axis, then draw a vertical line.
Answered by Paws
Oh Thanks so much for your help!
But can I just ask, do the two equation have anything to do with each other? And don't I have to times both sides by 5/3 to make it equal?
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