30.9k views
5 votes
Find the slope of the line described by each equation.Use this formula : m= y2-y1/x2-x1 -2x - 5y = 10 4x + 2y = 8 -6x + 2y = 12 8y - 4x = 32 6y + 8x = 24

User FabianCook
by
3.6k points

1 Answer

7 votes

Equation of the line is slope-intercept form

The equation of the line can be written in the form:

y = mx + b

Where m is the slope and b is the y-intercept

If we are given the equation of the line in any other form, we can convert it to the above form by solving them for y. Let's find the slope of the following lines:

-2x - 5y = 10

Adding 2x:

-5y = 2x + 10

Dividing by -5:

y = -2/5x - 2

The coefficient of x is the slope, thus m=-2/5

4x + 2y = 8

Dividing by 2:

2x + y = 4

Subtracting 2x:

y = -2x + 4. Here the slope is m=-2

-6x + 2y = 12

Dividing by 2:

-3x + y = 6

Adding 3x:

y = 3x + 6. The slope is m=3

8y - 4x = 32

Dividing by 4:

2y - x = 8

Adding x:

2y = x + 8

Dividing by 2:

y = 1/2 x + 4. The slope is m=1/2

6y + 8x = 24

Dividing by 2:

3y + 4x = 12

Subtracting 4x:

3y = -4x + 12

Dividing by 3:

y = -4/3 x + 4. The slope is -4/3

User Uzair Faisal
by
3.8k points