Write a linear equation in the form of y = mx + b for the following table. Click Here for Help Video

x

y
0
8
5
-

−10
10


-28


𝑦
=
y=

𝑥
x
+
+

1 answer

To write a linear equation in the form \( y = mx + b \), we first need to identify the values given in the table. The table has the points:

  • When \( x = 0 \), \( y = 8 \)
  • When \( x = 5 \), \( y = -10 \)
  • When \( x = 10 \), \( y = -28 \)

We can use any two points to calculate the slope \( m \) and then use one of the points to solve for \( b \) (the y-intercept).

Let's use the points \( (0, 8) \) and \( (5, -10) \).

Step 1: Calculate the Slope (m)

The formula for the slope \( m \) between two points \( (x_1, y_1) \) and \( (x_2, y_2) \) is given by:

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Using the points \( (0, 8) \) and \( (5, -10) \):

  • \( x_1 = 0, y_1 = 8 \)
  • \( x_2 = 5, y_2 = -10 \)

\[ m = \frac{-10 - 8}{5 - 0} = \frac{-18}{5} = -\frac{18}{5} \]

Step 2: Solve for the y-intercept (b)

Using the slope-intercept form \( y = mx + b \) and the point \( (0, 8) \):

\[ 8 = -\frac{18}{5}(0) + b \] \[ b = 8 \]

Step 3: Write the Linear Equation

Now, we can write the equation of the line:

\[ y = -\frac{18}{5}x + 8 \]

This is your linear equation in the form of \( y = mx + b \).

Therefore, the final answer is:

\[ y = -\frac{18}{5}x + 8 \]