Yes or No
A graph starts at zero and curves towards the y axis. Is it proportional?
No
If k=4, write a y=kx equation.
y=4x
George walks 8 miles in 4 hours. How many miles does he walk per hour?
2 miles
A school's population increases from 4,000 to 6,500. Find the percent change.
62.5%
I spent $15.25 before tax. The store charges 8% tax. What is my total after tax?
$16.47
If my graph goes through zero, is a straight line, and has a different rate for each point, is it proportional?
If k=1/2, write a y=kx equation.
y=1/2x
Jane builds toys at a rate of 15 toys every 5 minutes. John builds toys at a rate of 20 toys every 10 minutes.
Who builds toys faster?
John
The zoo went from 180 pounds of food to 80 pounds of food in one day. What is the percent change per day?
55.5%
I want to buy a sweater for $21 dollars. I have a coupon for 15% off. How much will I have to pay?
$17.85
A graph goes up by the same amount every time, has a straight line, and goes through zero. Is it proportional?
Yes
If y=10 and x=5, what would k equal?
2
If 3 pounds of strawberries cost $5.34, what is the unit rate?
$1.78
In 2005 there were 30 inches of snow in Lincoln. In 2010 there were 45 inches of snow. What was the percent increase?
50%
I am buying tires for $400. I have a coupon for half off and a coupon for 55% off. Which coupon will save me the most money? How much will I pay for the tires using that coupon?
55% off; $180