Grade 9

Practice 3-3: The Slope of a line

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Answer the following questions

dealing with The Slope of a line.

1.

What is the slope of the line passing through (2,4) and (-3,-6)?

Choose one:

2

-2

1/2


2
.

What is the slope of the line perpendicular to 2y = -6x – 10?

Choose one:

-3

3

1/3

3.

Given 3y – 4x = 5 and 4y + 6 = 3x. Are these lines parallel, perpendicular or neither?

Choose one:

perpendicular

parallel

neither


4
.

Which of these equations represents a line parallel to the line 2x + y = 6?

Choose one:

y – 2x = 4

2x – y = 8

y + 2x = 1


5
.

Find the equation of the line that has a slope of -2 and a y-intercept of -9.

Choose one:

2x + y = -9

-2x – y = -9

2x – y = 9

6.

Find the slope of the line whose equation is y – 3x = 7.

Choose one:

-3

3

-1/3


7
.

Which equation represents the line whose slope is 1 an whose y-intercept is 0?

Choose one:

y = x

x = 1

x = -y

8.

Find k so that y – 3kx = 6 has slope m = -3/7

Choose one:

-7

1/7

-1/7


Back to Lesson 3-3: The Slope of a line

Practice 3-4: finding an equation of a line

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Answer the following questions

dealing with finding an equation of a line.

 

1.

what is the standard form of the equation of this
line?

Choose one:

2x + y = 5

2x + y = 11

2x + y = 1


2
.

What is the equation of this line?

Choose one:

y – 5 = -1(x – 3)

y = 3

x = 3

3.

What is the equation of this line?

Choose one:

y + 3 = 0 (x – 4)

y = -4

y = 4


4
.

What is the Standard Form of the equation of a straight line for
this graph?

Choose one:

2x + 3y = 15

2x – 3y = 15

3x – 2y = 10


5
.

find an equation in standard form of the line that passes through the points (1, -4) and (3, 2)?

Choose one:

x – y = 5

2x – y = 4

3x – y = 7

6.

find an equation in standard form of the line: – parallel to the line y = -3x + 1 and passing through the point (-1, 2)?

Choose one:

3x + y = -1

3x + y = -5

3x + y = 1


7
.

find an equation in standard form of the line: – perpendicular to the line y = -(¼)x + 5 and – passing through the point (-6, 4)?

Choose one:

4x – y = 28

4x + y = 28

4x – y = -28

8.

The slope-intercept form of the equation of a straight line is y = – (2/3)x + 7/3. What is the standard form of the equation?

Choose one:

2x – 3y = 7

2x + 3y = 7

2x – 3y = -7


Back to Lesson 3-4: finding an equation of a line

Practice 7-1: Geometric Mean

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Answer the following questions

dealing with Geometric mean.

 

1.

Find x:

Choose one:

4

6

9

 

2.

Find x. round to the nearest tenth:

Choose one:

8

6.8

6.9

 

3.

Find x. round to the nearest tenth:

Choose one:

2.5

4.5

7.5

 

4.

Find x. round to the nearest tenth:

Choose one:

4.7

4.9

6.9

 

5. Find x. round to the nearest tenth:

Choose one:


25

7.2

1.6

 

6. Find x and y. round to the nearest tenth:

Choose a value for x:

8

10

15

 

 

Choose a value for y:

7.7

7.8

7.1

7. Find x:

Choose one:

9

6

4

 

 

8. Find CD. round to the nearest tenth:

Choose one:

4.6

6.5

2.5

 

 

Back to Lesson 7-1: Geometric Mean