Alg 1 Mixed Practice

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AI.9.9.D

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AI.9.2.G

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AI.9.6.C

A teacher's age is 6 years greater than 2 times a student's age. A principal's age is 10 years greater than 3 times the student's age.

If x represents the student's age in years, which expression represents how many years older the principal is than the teacher?

• 7
• 16
• -18
• -12
• 4
• 8
• 9
• 15

The graph of a relation is shown on the grid.

Which statement is true?

• The graph does not represent y as a function of x, because more than one point has an x-coordinate of 1.

• The graph represents y as a function of x, because only one point has a y-coordinate of 2.

• The graph does not represent y as a function of x, because more than one point has a y-coordinate of 1.

• The graph represents y as a function of x, because only one point has an x-coordinate of 2.