Mr Freeman Raw his students a 10problem multiple choice quiz

Mr. Freeman Raw his students a 10-problem, multiple choice quiz over equations. In grading the test, he gave students ten points for each correct answer with no partial credit. The graph below represents the score students could make as a function of the number of questions they answered correct h on the quiz. What is the domain of the function, and is the function continuous or discrete? 0 lessthanorequalto lessthanorequalto x lessthanorequalto 10. x elementof Z. discrete 0 lessthanorequalto x lessthanorequalto 100, x elementof Z, discrete 0 lessthanorequalto x lessthanorequalto 100, continuous 0 lessthanorequalto x lessthanorequalto 10, continuous.

Solution

By using the graph

Since a student can give correct answers between zero to 10

Domain of this function will be

D = 0 <= x <= 10 where x belongs to Z

Since a student can get correct marks between zero to 100, but only in multiple of 10

Range of this function will be

R = 0 <= y <= 100 where y belongs to 10z

Now the domain is discrete, since we cannot use each value from 0 to 10

Correct option is A.