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Mathematics 11 Online
OpenStudy (anonymous):

Write the equation of the line with an undefined slope, passing through the point (2, 5).

jimthompson5910 (jim_thompson5910):

hint: all lines with undefined slopes are vertical lines

OpenStudy (anonymous):

But how would I write the equation?

jimthompson5910 (jim_thompson5910):

what is a point that is right above (2,5)

OpenStudy (anonymous):

(2,6)??

jimthompson5910 (jim_thompson5910):

what's a point right below (2,5)

OpenStudy (anonymous):

(2,4)

jimthompson5910 (jim_thompson5910):

so if you connect all these points, you get a vertical line

jimthompson5910 (jim_thompson5910):

what do all of these points have in common?

OpenStudy (anonymous):

2?

jimthompson5910 (jim_thompson5910):

good, so is the y coordinate 2? or is the x coordinate 2?

OpenStudy (anonymous):

The y coordinate is 2?

jimthompson5910 (jim_thompson5910):

points are of the form (x,y) not (y,x)

OpenStudy (anonymous):

Okay, so 2 is the x.. not y. Sorry

jimthompson5910 (jim_thompson5910):

its ok

jimthompson5910 (jim_thompson5910):

so x = 2 is the equation

jimthompson5910 (jim_thompson5910):

x = 2 graphs a vertical line where all the points on the line have an x coordinate of 2

OpenStudy (anonymous):

Ohh okay, gotcha.

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