Chapter 7 7.1 Slope-Intercept Form Worksheet - Mhr Page 5
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17Your Turn
What are the slope and y-intercept of the line shown in
a)
the graph?
y
4
2
x
2
4
-4
-2
0
-2
-4
What is the equation of the line in slope-intercept form,
b)
y = mx + b?
Use graphing technology to check your equation.
c)
Example 2
Convert an Equation to Slope-Intercept Form
A students’ council rents a portable dunk tank as a fund-raising
activity. Students pay for the chance to hit a target with a ball
and dunk a teacher into a tank of water.
The relationship between the number of balls thrown, x, and the
profi t, y, in dollars, may be represented by the equation
3x - 2y - 600 = 0.
Rewrite the equation in slope-intercept form.
a)
State the slope of the line. What does the slope represent?
b)
Identify the y-intercept. What does it represent?
c)
The break-even point is the point at which the money raised
d)
equals the money spent. How many balls must the students
sell to reach the break-even point?
344
MHR • Chapter 7
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