Direct Proportions - so far...

Which graph shows a direct proportion?

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Which equation does NOT show a direct proportion?

• $y\ =\ 2.853x$

• $y\ =\ \frac{x}{3}$

•  $y\ =3x\ +\ 1$ 

• $y\ =\ 6x$

What equation is shown for this graph?

• y = 25x

• y = 225x

• y = 50x

• y = 0.02x

Which table shows a direct proportion? (check all that apply)

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What equation is shown by the data on the table?

• $y\ =\ 4x$

• $y\ =\ \frac{1}{4}x$

Haley burns 600 calories in two and a half hours on the treadmill. Write a direct proportion equation to show this situation.

• $m\ =\ \frac{2.5}{600}$

• $y\ =\ \frac{600}{2.5}$

• $y\ =\ 600x$

• $y\ =\ 240x$

What is "m" for this graph?

• $m\ =\ 10$

• $m=2.5$

• $m=5$

• $m=0.4$

Is this equation a direct proportion?

y = 5

• yes

• no

Which situation does NOT describe a direct proportion?

• Biff earns $12.50 dollars per hour babysitting.

• Girl scouts earned $80 on Sunday washing 5 cars.

• Power Gym charges $50 per month and a $100 membership fee

• Harvey got a speeding ticket for going 85 miles per hour

Steve can run 6 laps in 4 minutes. How long will it take him to run 27 laps?

• 40.5 minutes

• 12 minutes

• 18 minutes

• 1 hour