Algebra 1 Unit 9 Test Review

Mathematical Equivalence

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Mathematical Equivalence

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What is the range of the part of this exponential function on the grid?

After drinking a can of cola, the amount of caffeine in milligrams in a person’s body x hours after drinking it is given in the table. What is the equation?

Based on past experiences, a homeowner estimates that appliances lose 35% of their resale value each year.  Which function can be used to determine the value of a refrigerator after x years?

• The cost of living will increase by approximately 1% each year.

• The cost of living will decrease by approximately 1% each year.

• The cost of living will increase by approximately 5% each year.

• The cost of living will decrease by approximately 5% each year.

The population of the US in millions of people is given in the table.

Use a graphing calculator to find an exponential function that best fits this data, where x represents the number of years after 1970 and y is in millions of people.

The population of Noahville, TX is modeled by the exponential function, f, where x is the number of years after the year 2013.  The graph of f is shown on the grid. 

Which inequality best represents the range of f in this situation?

Which table does not represent y as a function of x?

• F

• G

• H

• J

• The graph has a vertical asymptote

• The graph decreases from left to right