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Algebra 1

Lesson 4: Interpreting function notation

Function notation word problems

CCSS.Math: HSF.IF.A.2

Tessa's class had a math exam where the grades were between 0 and 10.

N, left parenthesis, g, right parenthesis models the number of students whose grade on the exam was g.

What does the statement N, left parenthesis, 8, right parenthesis, is greater than, 2, dot, N, left parenthesis, 5, right parenthesis mean?

(Choice A)
There are 8 students whose grade was higher than twice the grade of another group of 5 students.
(Choice B)
The number of students whose grade was higher than 5 is greater than the number of students whose grade was 5 or lower.
(Choice C)
The number of students whose grade was 8 is more than twice the number of students whose grade was 5.

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