TEKS.MATH.8.5F

y = 5/7x +2
y = 5/7x - 30
These lines are...

• Parallel
• Perpendicular
• Neither

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TEKS.MATH.8.5F

Assume y varies inversely with x. If x=7 when y=4, what is y when x=2 ?

• 4
• 14 
• 7
• 28

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TEKS.MATH.8.5F

Which ratios are proportional?

• 10/20  and  20/40
• 10/17  and  20/40
• 13/18  and  16/25
• 1/4  and  1/3

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TEKS.MATH.8.5F

Is this table proportional or non-proportional?

• Proportional
• Non-Proportional

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TEKS.MATH.8.5F

Which of the following statements is true?

• The charges for bus A and bus B represent proportional situations
• The charges for bus C and bus D represent a non-proportional situations
• The charges for bus A and bus D representa non- proportional situation
• The charges for bus B and bus D represent proportional situations

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TEKS.MATH.8.5F

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

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TEKS.MATH.8.5F

Kathy charges $25.00 per hour to tutor students. Is this an example of a proportional relationship?

• Yes, because $25.00 is a constant rate of change.

• Yes, because she tutors more than one student.

• No, because there is no initial fee.

• If cannot be determined because we don't know how many students she tutors.

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TEKS.MATH.8.5F

Which equation represents an inverse variation?

• $y=-3x+5$

• $y=-2x$

• $y=\frac{x}{8}$

• $y=\frac{8}{x}$

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TEKS.MATH.8.5F

Y varies inversely to x. If y = 0.5 when x = 4, which equation represents this situation?

• $y=\frac{2}{x}$

• $y=4x$

• $y=2x$

• $y=\frac{x}{2}$

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TEKS.MATH.8.5F

The ratio of 10m to 10 km is:

• 1:10

• 1:100

• 1:1000

• 1000

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TEKS.MATH.8.5F