Applying Linear Equations
1/
/13
Ex: Suppose you have a $5 off coupon at a fabric store. You buy fabric that cost’s $7.50 per yard. Write
an equation that models the total amount of money y you pay if you buy x yards of fabric.
Dependent Variable:
Function Rule:
Graph:
What does the slope represent in the i3’roblem?
What does the y-intercept represent in the problem?
Independent Variable:
Ex:The temperature at sunrise in 65° F. Each hour during the day, the temperature rises 5° F. Write an
equation that models the temperature y, in degrees Fehrenheit, afterx hours during the day.
Dependent Variable:
Function Rule:
Graph:
What does the slope represent in the problem?
What does the y-intercept represent in the problem?
Independent Variable:
Ex: Suppose you are doing a 5000-piece puzzle. You have already placed 175 pieces. Every minute you
place 10 more pieces.
Dependent Variable:
Equation:
Graph:
What does the slope represent in the problem?
Wh? does the y-intercept represent in the problem?
After 50 more minutes, how many pieces will you have placed?
Independent Variable:
Ex: A sailboat begins a voyage with 145 lbs of food. The crew plans to eat a total of 15 lbs of food per
day.
Independent Variable:
Dependent Variable:
Equation:
Graph:
What does the slope represent in the problem?
What does the y-intercept represent in the problem?
The crew plans to have 25 lb of food remaining when they end their voyage. How many days does the
crew expect their voyage to last?