164k views
1 vote
What is the equation of the line?
(3,-8) and (6,-4)

User Nerdboy
by
7.2k points

1 Answer

6 votes

To find the equation of the line passing through the points (3, -8) and (6, -4), you can use the slope-intercept form of a linear equation, which is given by:

y = mx + b

where:

- m is the slope of the line,

- b is the y-intercept (the y-coordinate where the line crosses the y-axis).

First, calculate the slope (m) using the formula:

m = (y_2 - y_1) / (x_2 - x_1)

Using the points (3, -8) and (6, -4):

m = (-4) - (-8) / 6 - 3

m = 4/3

Now that you have the slope (m), you can use one of the points to find the y-intercept (b). Let's use the point (3, -8):

y = mx + b

-8 = 4/3(3) + b

Now, solve for b:

-8 = 4 + b

b = -12

Now that you have both the slope (m) and the y-intercept (b), you can write the equation of the line:

y = 4/3x - 12

So, the equation of the line passing through the points (3, -8) and (6, -4) is y = 4/3x - 12.

hope this helps :)

User Jeff Werner
by
8.2k points