Ratios and vocab
If Mimi drives 50 miles in 2 hours, what is her unit rate?
25 miles per hour
2/3 and 4/6
Are the ratios equivalent? Show proof.
Yes. Cross products: 2 x 6 = 12, 3 x 4 = 12
Jump is times 2. 2 x 2 is 4, 3 x 2 is 6
Solve for x.
x/6 = 6/9
x = 4
A unit rate is a ratio with a denominator of ____.
1
If James types 120 words in 3 minutes, what is his rate of typing?
40 words per minute
Do the tables show a proportional relationship? (see Google Slide 83)
only table B
Solve for a.
a/2 = 9/6
a = 3
multiply and divide
If 10 bags of Hot Cheetos cost $3.50, then how much does 1 bag cost?
$0.35 per bag
What is the unit rate for this table? (see Google Slide slide 90)
Solve for g.
g/6 = 15/10
g = 9
Henry reads 8 pages in 6 minutes, then he reads 4 pages in how many minutes?
What is 3 minutes
True or False. The constant of proportionality is directly related to the unit rate.
TRUE
Which is the better deal $20 for 5 t-shirts or $24 for 8 t-shirts? Prove your answer using unit rates.
$24 for 8 t-shirts (rate of $3 per shirt) instead of $4 per shirt
What is the constant of proportionality of the proportional relationship in the table? (see Google Slide slide 79)
4
Solve for x.
2/10 = 18/x
x = 90
What is the better buy? 6 bananas for $2.49? or 12 bananas for $5.32?
**6 bananas for $2.49**
$0.42 per banana
12 bananas for $5.32
$0.44 per banana.
Write an equation for the proportional relationship in the table (see Google Slides slide 79)
y = 4x