Copy of Tito Beckley : SmarthMathz Periodic Assessment : MATH – APRIL 2025

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One Saturday afternoon, three friends decided to keep track of the number of text messages they received each hour from 8 am to noon. The results are shown below:

Emily said that the number of messages she received increased by 8 each hour

Jessica said that the number of messages she received doubled every hour.

Chris said that he received 3 messages the first hour, 10 the second hour, none the third hour, and 15 the last hour.

Which of the friends’ responses best classifies the number of messages they received each hour as a linear function?

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 A landscaping company charges a set fee for a spring clean-up, plus an hourly labour rate. The total cost is modelled by the function C(x) = 55x + 80. In this function, what does 55 represent?

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12.   The graph of a linear equation passes through the points (2,5) and (4,9). What is the slope of the line?

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14.   The mean of five numbers is 12. If four of the numbers are 10, 12, 14, and 16. What is the fifth number?

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