A person sold a 5 pen for the cost of 4 pens

let the number of pen be 5 if he sold 4 pens then he sold it in 20 rs so he has a loss of 25%

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.