A man buys a marker at Rs. 40 and sells it at Rs. 50. What is the profit percentage?​

Step-by-step explanation:

C.P of the marker= Rs. 40

S.P of the marker= Rs. 50

Profit= S.P- C.P

= 50- 40

= Rs. 10

Profit%= {×100}%

= {×100}%

= 25%

32

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value