EOC Practice #5 SPI 3102.1.5.

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Presentation transcript:

EOC Practice #5 SPI 3102.1.5

EOC Practice #5 Recognize and express the effect of changing constants and/or coefficients in problem solving.

Ben works at a shoe store. The equation y = 15x + 60 represents his daily earnings, y, based on selling x pairs of shoes. What is represented by the slope in this equation? A. The total pairs of shoes that Ben sells each day B. The total amount of money Ben earns each day C. The amount of money Ben earns for each pair of shoes he sells D. The amount of money Ben earns if he does not sell any shoes

Which transformation occurs to the graph of y = 2x + 5 when the equation of the line changes to y = –2x + 5? A. The line shifts to the left 2 units. B. The line shifts down 2 units. C. The line is reflected across the x-axis. D. The line is reflected across the y-axis.

Ally earns $2,500 per month plus a commission of 7% of the total dollar amount of each sale she makes. Her total monthly earnings, P, are represented by the equation P = 2,500 + 0.07t, where t represents the total dollar amount of her sales for the month. Which equation will represent her total monthly earnings in dollars if her commission increases an additional 2%? A. P = 2,700 + 0.09t C. P = 2,700 + 0.07t B. P = 2,500 + 0.09t D. P = 2,500 + 0.05t

Which transformation occurs to the graph of y = –5x + 2 when the equation of the line changes to y = –5x – 3? A. The line shifts to the left 5 units. B. The line shifts down 5 units. C. The line is reflected across the x-axis. D. The line is reflected across the x-axis.

What transformation occurs to the graph of y = 3x + 1 when the equation of the line changes to y = 6x + 1? A. The line becomes steeper. B. The line becomes less steep. C. The line shifts 3 units up. D. The line shifts 3 units right.

Jim and Sam are both spending the night with a cousin. The total number of miles Jim drives, J, including a 2.5 mile detour for lunch, is given by the equation J = 65t + 2.5. The total number of miles Sam drives, S, including a 1 mile detour to pick up another cousin, is given by the equation S = 70t + 1. If t represents the time in hours after each boy leaves home, which statement best compares Jim’s speed to Sam’s speed? A. Jim’s speed is 5 miles faster than Sam’s. B. Jim’s speed is 1.5 miles faster than Sam’s. C. Jim’s speed is 5 miles slower than Sam’s. D. Jim’s speed is 1.5 miles slower than Sam’s.

The Answers

Ben works at a shoe store. The equation y = 15x + 60 represents his daily earnings, y, based on selling x pairs of shoes. What is represented by the slope in this equation? A. The total pairs of shoes that Ben sells each day B. The total amount of money Ben earns each day C. The amount of money Ben earns for each pair of shoes he sells D. The amount of money Ben earns if he does not sell any shoes

Which transformation occurs to the graph of y = 2x + 5 when the equation of the line changes to y = –2x + 5? A. The line shifts to the left 2 units. B. The line shifts down 2 units. C. The line is reflected across the x-axis. D. The line is reflected across the y-axis.

Ally earns $2,500 per month plus a commission of 7% of the total dollar amount of each sale she makes. Her total monthly earnings, P, are represented by the equation P = 2,500 + 0.07t, where t represents the total dollar amount of her sales for the month. Which equation will represent her total monthly earnings in dollars if her commission increases an additional 2%? A. P = 2,700 + 0.09t C. P = 2,700 + 0.07t B. P = 2,500 + 0.09t D. P = 2,500 + 0.05t

Which transformation occurs to the graph of y = –5x + 2 when the equation of the line changes to y = –5x – 3? A. The line shifts to the left 5 units. B. The line shifts down 5 units. C. The line is reflected across the x-axis. D. The line is reflected across the x-axis.

What transformation occurs to the graph of y = 3x + 1 when the equation of the line changes to y = 6x + 1? A. The line becomes steeper. B. The line becomes less steep. C. The line shifts 3 units up. D. The line shifts 3 units right.

Jim and Sam are both spending the night with a cousin. The total number of miles Jim drives, J, including a 2.5 mile detour for lunch, is given by the equation J = 65t + 2.5. The total number of miles Sam drives, S, including a 1 mile detour to pick up another cousin, is given by the equation S = 70t + 1. If t represents the time in hours after each boy leaves home, which statement best compares Jim’s speed to Sam’s speed? A. Jim’s speed is 5 miles faster than Sam’s. B. Jim’s speed is 1.5 miles faster than Sam’s. C. Jim’s speed is 5 miles slower than Sam’s. D. Jim’s speed is 1.5 miles slower than Sam’s.