How to hide a specific line property appears in x axis in twoway plot?

[Biswa bhusan]

Dear Stata users, I want to hide a specific line that appears in the x-axis. Here is my code for twoway plot,
sysuse auto.dta
g b=_n
twoway line price weight b

Then, the graph appears. I have attached the graph. Now, I want to delete only "price" from the x-axis. Please suggest

[Nick Cox]

line price weight b, legend(order(2))

[Biswa bhusan]

Thank you Nick Cox