Step-by-step explanation:
Substitute where x=0, 1, 2, 3and y=0, 1,2,3
And plot in the graph by joining the points













Number of fish that are not carp = Total fish - number of carp fish


Since 1/3 of remaining fish which are not carp are sticklebacks , Number of sticklebacks =



<u>Now</u> ,
Number of tench = Total number of fish - (Number of carp + Number of sticklebacks)



Ratio of carp to sticklebacks to tench in the pond =

Answer:
40%
Step-by-step explanation:
Degree representing students who prefer burgers = 144°
Percentage of students who like burger = 


Percentage of students who offered burger = 40%