What is the equation of the line with points represented in the table?

A 2-column table with 3 rows. Column 1 is labeled x with entries negative 8, 4, 8. Column 2 is labeled y withentries 6, negative 3, negative 6.

What can you conclude about the line represented in the table? Select all that apply.

Using either slope-intercept or point-slope forms will result in different equations.
Using either slope-intercept or point-slope forms will result in the same equation.
The slope is Negative four-thirds.
The slope is Negative three-fourths.
The y-intercept is 2.
The y-intercept is 0.

1 answer

To determine the equation of the line represented by the points in the table, we first identify the points:

  • Point 1: \( (-8, 6) \)
  • Point 2: \( (4, -3) \)
  • Point 3: \( (8, -6) \)

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:

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

We can use the first two points \((-8, 6)\) and \( (4, -3)\):

\[ m = \frac{-3 - 6}{4 - (-8)} = \frac{-9}{12} = -\frac{3}{4} \]

Let's check the slope with the second and third points \( (4, -3) \) and \( (8, -6) \):

\[ m = \frac{-6 - (-3)}{8 - 4} = \frac{-3}{4} \]

Both calculations give the same slope: \( -\frac{3}{4} \).

Step 2: Find the y-intercept (b)

We can use the slope-intercept form of the equation, which is \(y = mx + b\). Using the slope \(m = -\frac{3}{4}\) and one of the points, let’s use point \( (4, -3) \):

\[ -3 = -\frac{3}{4}(4) + b \]

Calculating this gives:

\[ -3 = -3 + b \] \[ b = 0 \]

Thus, the y-intercept is \(0\).

Step 3: Write the equation of the line

Using the slope-intercept form:

\[ y = -\frac{3}{4}x + 0 \quad \text{or simply} \quad y = -\frac{3}{4}x \]

Conclusion

From this analysis, we can draw the following conclusions:

  • Using either slope-intercept or point-slope forms will result in the same equation.
  • The slope is Negative three-fourths.
  • The y-intercept is 0.

Thus, the correct conclusions from the provided options are:

  • Using either slope-intercept or point-slope forms will result in the same equation.
  • The slope is Negative three-fourths.
  • The y-intercept is 0.