Proportional or Nonproportional?
If 2 pencils cost $4, and 3 pencils cost $6, is it proportional?
Yes, $2 each.
If y = 2x, what is k?
2
k = 3. Write an equation.
y = 3x
6 pencils cost $12. How much does 1 pencil cost?
$2 each
Is the ratio 2:4 equivalent to 1:2?
Yes
A car goes 30 miles in 1 hour and 60 miles in 2 hours. Proportional?
Yes, same rate.
4 apples cost $8. What is k (cost per apple)?
k = $2 per apple
k = 5. Write an equation.
y = 5x
3 sandwiches cost $15. What is the price per sandwich?
$5 each
Fill in the blank to make an equivalent ratio:
3 : 6 = 1 : ___
2
1 pizza costs $10. 3 pizzas cost $35. Proportional?
No, price doesn’t stay the same per pizza.
A car goes 40 miles in 2 hours. What is k (miles per hour)?
20 miles/hour
A car goes 10 miles each hour. Write an equation for distance (d) and time (t).
d = 10t
4 notebooks cost $20. What is the unit rate?
$5 per notebook
4 : 8 is the same as ___ : 2
1 : 2
If 5 sodas cost $10 and 2 sodas cost $4, proportional?
Yes, $2 each.
y = 10x → what is k?
k = 10
A plant grows 2 inches every week. Write an equation for height (h) and weeks (w).
h = 2w
10 apples cost $8. What is the cost per apple?
$0.80 each
Are 5:10 and 10:20 equivalent?
Yes, both equal 1:2
A graph shows points (1, 4), (2, 8), (3, 13). Proportional?
No, 13 breaks the pattern.
y = 0.25x → what is k?
k = 0.25
If k = 4 and x = number of shirts, y = total cost, what’s the equation?
y = 4x
5 cans of soup cost $10. How much for 1 can?
$2 per can
6 : 3 = ___ : 1
2 : 1