Introduction to Functions — Quiz

Question 6 • CMS 2026-2027 NC Math 1 CREDIT RECOVERY

Which table represents a function?

Answer

Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 4'; Column 2, '2' Row 3: Column 1, '3'; Column 2, '5' Row 4: Column 1, '1'; Column 2, '3' Row 5: Column 1, 'negative 4'; Column 2, '0'

Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 3'; Column 2, 'negative 1' Row 3: Column 1, '0'; Column 2, '0' Row 4: Column 1, 'negative 2'; Column 2, 'negative 1' Row 5: Column 1, '8'; Column 2, '1'

Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 5'; Column 2, 'negative 5' Row 3: Column 1, '0'; Column 2, '0' Row 4: Column 1, 'negative 5'; Column 2, '5' Row 5: Column 1, '6'; Column 2, 'negative 6'

Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 4'; Column 2, '8' Row 3: Column 1, 'negative 2'; Column 2, '2' Row 4: Column 1, 'negative 2'; Column 2, '4' Row 5: Column 1, '0'; Column 2, '2'

Explanation

A table represents a function when each x-value is paired with exactly one y-value. In choice C, the x-values −3, 0, −2, and 8 are all different, so each has only one output. The other tables repeat an x-value with different y-values, so they do not represent functions.

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