Algebra Support Final Exam Review 4th

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Front

Formulate a linear function C(x) that models the cost for x minutes of airtime usage if the Roaming Cell Phone Company charges $15.00 per month plus $2 per minute.

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C(x) = 2x + 15

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What is the sum of two rational numbers? Is it rational or irrational?

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The sum of two rational numbers is never irrational.

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What does a correlation coefficient of -0.75 indicate about the relationship between two variables?

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There is a strong negative linear association between the two variables.

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What is the relationship between the total amount of snow measured in inches and the total amount of snow measured on the same day in centimeters?

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The association is positive.

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Define a linear function.

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What does it mean for two lines to be parallel?

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Two lines are parallel if they have the same slope and will never intersect.

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What is the definition of a correlation coefficient?

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A correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables.

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What is the formula for calculating the slope between two points (x1, y1) and (x2, y2)?

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What is the y-intercept in the equation of a line?

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