What equation explains this line?

(-2,4) (1,13)

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
2 hours ago

To find the equation of the line that passes through the points \((-2, 4)\) and \( (1, 13)\), we can use the slope-intercept form of a linear equation, which is given by:

\[ y = mx + b \]

where \(m\) is the slope and \(b\) is the y-intercept.

Step 1: Calculate the slope \(m\)

The slope \(m\) of a line through two points \((x_1, y_1)\) and \((x_2, y_2)\) can be calculated using the formula:

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

Using the points \((-2, 4)\) and \( (1, 13)\):

  • \(x_1 = -2, y_1 = 4\)
  • \(x_2 = 1, y_2 = 13\)

Substituting these values into the slope formula:

\[ m = \frac{13 - 4}{1 - (-2)} = \frac{9}{3} = 3 \]

Step 2: Use one of the points to find the y-intercept \(b\)

Now that we have the slope, we can use one of the points to find the y-intercept \(b\). We can use the point \((-2, 4)\):

\[ y = mx + b \] Substituting in \(m = 3\), \(x = -2\), and \(y = 4\):

\[ 4 = 3(-2) + b \] \[ 4 = -6 + b \] \[ b = 4 + 6 = 10 \]

Final equation

Now that we have \(m\) and \(b\), we can write the equation of the line:

\[ y = 3x + 10 \]

This is the equation that explains the line passing through the points \((-2, 4)\) and \( (1, 13)\).