Question 1208165
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In general,  probably,  your understanding is correct,  but wording is far from to be perfect.


More accurate mathematical wording is something like this 


<pre>
    x-coordinate of the point (x,y) represents the position of the point with reference to the x-axis, and 
    y-coordinate of the point (x,y) represents the position of the point with reference to the y-axis.
</pre>

Look into this source 

https://www.cuemath.com/calculus/x-and-y-coordinates/

and read/learn from there.


Does your lovely textbook by &nbsp;Sullivan say something / (teach you) &nbsp;about it ?


Did you study Sullivan for this issue as thoroughly as we expect it from you ?