Question 366169
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Hi, 
x= 1/3
this is  a line paralell to  the y axis, its slope is undefined
and it has no y intercept because the line does not intercept the y axis.

{{{drawing(300,300,-5,5,-5,5,blue(line(.3,10,.3,-10)),grid(1),graph(300,300,-5,5,-5,5))}}}