Identify the Independent Variable
At a deli counter, the price of an item is based on its weight.
Item's weight
At a deli counter, the price of an item is based on its weight.
The total price.
The cost to go to the movies is 9 dollars plus an extra 3 dollars for each snack that you buy. Write an equation to represent the total amount of money, m, that you spend when buying s snacks.
m = 3s + 9
Is the ordered pair (2,5) a solution to the equation?
2x + 1 = y
Yes
Wyatt is studying for a test. The longer Wyatt spends studying, the higher his grade will be.
The time Wyatt spends studying.
Wyatt is studying for a test. The longer Wyatt spends studying, the higher his grade will be.
Wyatt's grade.
It costs 50 dollars to join a gym, plus an additional 15 dollars each month. Write an equation that represents the total cost, c, when you join a gym for m months.
c = 50 + 15m
Is the ordered pair (3,10) a solution to the equation?
4x - 2 = y
Yes
It costs 99 cents to download music. The more music I download, the more money that I have to spend.
The number of songs that I download.
It costs 99 cents to download music. The more music I download, the more money that I have to spend.
Total money spent
A cupcake costs $3.50, plus an additional $0.25 for each topping. Write an equation to represent the total money spent on a cupcake, m, with t toppings.
m = 3.50 + 0.25t
Is the ordered pair (3,21) a solution to the equation?
y = 7x + 2
No
Madison gets paid 11 dollars an hour to babysit. The longer Madison babysits, the money she will make.
The time that Madison babysits.
Madison gets paid 11 dollars an hour to babysit. The longer Madison babysits, the more money she will make.
Total money earned
A video store charges 2 dollars and an additional 3 dollar maintenance fee for each DVD rental. Write an equation that represents the total cost, c, for each DVD rental, r.
c = 2 + 3r
Is the ordered pair (5,8) a solution to the equation?
x - 3 = y
No
y = 4x +3
x
y = 4x + 3
y
It costs 3 dollars to take a taxi, plus an additional 2 dollars for each mile you travel. Write an equation to represent the total price, p, for a taxi ride that is m miles long.
p = 3 + 2m
Is the ordered pair (2,23) a solution to the equation?
y = 23x