Percent Change
In interest rate increases from 3% to 7%. What is the change in procentenheter?
4
What is the förändringsfaktor for a 23% increase?
1.23
In the formula for the equation of a line, what does the k-value represent?
A plumber charges 250 kr for a service call plus 500 kr per hour of service. What is the fixed amount?
250
40%
What is the förändringsfaktor for a 34% decrease?
0.66
In the formula for the equation of the line, which variable represents the y-intercept?
m
You hire a painter to paint your kitchen. The painter charges 2000 kr as a base cost as well as 50 kr per square meter. What is the variable amount?
50
A christmas tree which used to cost 1000 kr is now being sold for 700 kr. What is the percent decrease of the price?
30%
An items is put on sale for 15% off. How can you calculate the new price of the item using förändringsfaktorn?
The original price x 0.85
If a line has a gradient of 2 and a y-intercept of 5, what is the equation of the line?
y = 2x + 5
A canoe rental service charges a $20 transportation fee and $30 dollars per hour to rent a canoe. What is the cost of renting the canoe for 6 hours?
$200
Will buys a fancy cake for 450 kr and Clay buys a different cake for 300 kr. In percent, how much more expensive was Will's cake than Clay's?
50%
An apartment's rent was 21 000 per month before being increased by 5%. How can you calculate the new price of the rent using förändringsfaktor?
21 000 x 1.05
What is the gradient of an equation with points (-4, 13) and (1, -2)?
-3
For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitting.
C = 5h + 3
A store is having a sale on puzzles. A puzzle which was already 10% off is put on sale for another 10% off. What is the total percent decrease in the price of the puzzle?
19%
The price of shoes decreases by 20% and then by another 20%. Is the total decrease more than, less than, or equal to a 40% decrease of the original price?
Less than
What is the x-intercept of the line y = 6x - 24
4
A caterer charges $120 to cater a party for 15 people and $200 for 25 people. Assume that the cost (y) is a linear function of the number of people (x). Write an equation in for this function.
y = 8x