Review ~ Functions, Rate of Change and Proportions #2

A water hose discharges water at a rate of 180 gallons in 3 minutes. Which graph best represents this rate?

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The number of t-shirts that Kim can make varies directly with the amount of time she spends making the shirts. She makes 10 shirts in 1/4 hour. How many t-shirts can she make in 14 hours?

• 560

• 140

• 280

• 420

Is the table below proportional or non-proportional?

• Proportional

• Non-proportional

What three things make a graph a proportional relationship?

• The graph is a straight line.

• The graph passes through the origin.

• The ratio between variables is constant.

• The graph has a positive slope.

Which set of ordered pairs below is NOT a function?

• A: {(2, -2); (3, -3); (8, -4); (9, -5)}

• B: {(3, -1); (3, -2); (8, -2); (12, -2)}

• C: {(0, -12); (15, -1); (16, -2); (7, -5)}

• D: {(3, 0); (6, -8); (4, -8); (5, -9)}

When working with functions, for every "x" there is exactly how many "y’s"?

• 1

• 2

• 3

• 4

Which representation shows y as a function of x?

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Which set of ordered pairs below is a function?

• {(2,–2); (9,–3); (8,–4); (9,–5)}

• {(3,–1); (3,–2); (8,–2); (12,–2)}

• {(0,–12); (15,–1); (0,–2); (7,–5)}

• {(3, 0); (–3,–8); (4,–8); (5,–9)}

What is the rate of change of the graph below?

• 10

• 7.5

• 15

• 20

Is the relation a function?

• Yes

• No