Chapter 1: Expressions and Functions

Which graph matches the following statement?

You are driving a steady speed, then stop for a train. When the train passes, you resume your speed.

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The distances that members of a cross-country (marathon) team run each day are recorded with a GPS tracker. Yesterday the GPS read "3.5," and today the GPS read "4.2." Which unit of measure is most likely the unit for these measurements?

• inches (1 inch = 0.0254 m)

• feet (1 foot= 0.3048 m)

• yards (1 yard = 0.9144 m)

• miles (1 mile = 1609 m)

If f(x) = 2x - 2, find 2[f(3)].

• 4

• 10

• 2

• 8

Identify the function as linear or nonlinear.

• linear

• quadratic

• other

• nonlinear

Evaluate 3 x 2 - 6 / 2 + 5.

• -2

• -1

• 8

• 5

The high school football team is playing their biggest rival this weekend. The coach has promised the team a day off practice for every touchdown they score. Which of these is the independent variable?

• the number of days off practice they the team earns

• the number of touchdowns the team scores

• the number of field goals the team kicks

• the number of touchdowns their rival scores

Elton charges a standard price for every lawn mowed in his neighborhood. He charges a different rate for raking all the leaves off a yard. In one year, Elton mowed 109 lawns and raked 42 yards. Write an algebraic expression that represents how much money he made that year.

• (109 + m) + (42 + r)

• 151 • m • r

• 151 + m + r

• 109m + 42r

Evaluate 5⁶.

• 3,125

• 78,125

• 15,625

• 7,776

Choose the correct verbal expression for the algebraic expression 2(y² − 9) + 4.

• two times y squared minus nine plus four

• two times the quantity of y squared minus nine, plus four

• y squared minus nine times two, plus four

• 9 less than y squared minus nine plus four 9 less than y squared minus nine plus four

If g(x) = x² + 3x - 2, find g(-2).

• -12

• -4

• 8

• 4