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| PAGE: 229 | SET: Exercises | PROBLEM: 4 |
The equation is 
.
First find the y-intercept.
The y-intercept is the value of y, when x = 0.
(Substitute x = 0 in original equation)
(Zero product property: 
)
(Multiply each side by negative one)
(Product of two same signs is positive)
The y-intercept is 
.
The co-ordinate point is 
Next find the x-intercept.
The x-intercept is the value of x, when y = 0.
(Substitute y = 0 in original equation)
(Divide each side by 5)
(Cancel common terms)
(Divide: 
)
The x-intercept is 7
The co-ordinate point is 
Use these ordered pairs to graph the equation.
1. Draw a coordinate plane.
2. Plot the points.
3. Draw a line through these points.
The x-intercept is 7 and y-intercept is 
.
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