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# Lines, Slopes and Graphs

1. The slopes of the lines parallel to X axis and Y axis are
a. 0 and inf
b. inf and 0
c. 1 and -1
d. 0 and 0

2. The slope of the line parallel to the line y = 10x and passing through origin
a. 10
b. (0, 10)
c. 0
d. 1

3. The slope of the line perpendicular to x = 10 is
a. 10
b. 0
c. 1
d. inf

4. The x-intercept of the line y = 5x - 100 is
a. (0, -100)
b. (20, 0)
c. (0, 0)
d. 10

5. Find the slope of the line represented by 10x + 5y = 4 ?

6. Find the y-intercept of the line passing through (4, 4) and (9,9)?

#### Solution Preview

1. The slopes of the lines parallel to X axis and Y axis are
a. 0 and inf
b. inf and 0
c. 1 and -1
d. 0 and 0

The lines parallel to X axis have no slope or we can say the slope is zero.
The lines parallel to Y axis have slope undefined or we can say infinite.

2. The slope of the line parallel to the line y = 10x and passing through origin
a. 10
b. (0, 10)
c. 0
d. 1

When two lines are parallel, their slopes are equal. The slope of ...

#### Solution Summary

Lines, Slopes and Graphs are investigated.

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