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Chapter 4: Q. 137 (page 453)
Explain how you would choose three x- values to make a table to graph the line .
x is independent variable. So for any value of x, we can find respective value of y to draw the line.
For x-values 0, 5, -5 respective y- values are -2, -1, -3.
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In the following exercises, graph the line of each equation using its slope and y-intercept.
Plot each point in a rectangular coordinate system and identify the quadrant in which the point is located: 鈸� 鈸� 鈸� 鈸� 鈸�
An easy way to determine the slope of a roof is to set one end of a 12 inch level on the roof surface and hold it level. Then take a tape measure or ruler and measure from the other end of the level down to the roof surface. This will give you the slope of the roof. Builders, sometimes, refer to this as pitch and state it as an "12 pitch" meaning , where is the measurement from the roof to the level鈥攖he rise. It is also sometimes stated as an " -in-12 pitch".
a) What is the slope of the roof in this picture?
b) What is the pitch in construction terms?
In the following exercises, graph by plotting points.
The equation models the relation between the amount of Tuyet's monthly water bill payment, , in dollars, and the number of units of water, , used.
(a) Find Tuyet's payment for a month when units of water are used.
(b) Find Tuyet's payment for a month when units of water are used.
(c) Interpret the slope and -intercept of the equation.
(d) Graph the equation.
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