Mathematics 10c Unit 5 Student Worksheets With Answer Key Page 30
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48Linear Functions
LESSON FOUR - General Form
Ax + By + C = 0
Lesson Notes
Example 5
A small appliance store is having a sale on fans and lamps.
A fan costs $10, and a lamp costs $20. At the end of the day,
the revenue from these items is $120.
a) Find the intercepts of this relation.
fans ($10) lamps ($20)
revenue
b) Write an equation that relates the variables. State the dependent and independent variables.
c) Graph the relation in two ways:
i) lamps V.S. fans
ii) fans V.S. lamps
Equation
Equation
l
f
10
10
5
5
f
l
5
10
5
10
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