# How to specify an arbitrary slope with the vector command?

i want to draw a vector with the vector command, but it seems like that the slope must be specified in integers less than some limit, thus commands like

\put(0,10){\vector(8,7){200}}

will failed to compile, but this works:

\put(0,10){\vector(1,0){200}}

so how can i specify arbitrary slope, is there a way to specify two endpoints rather than specifying the slope

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