6. A line passes through the points (6, 5) and (3, 1). Use your knowledge of slope and different forms of equations to answer the following questions.

Part I: What is the slope of the line passing through the points (6, 5) and (3, 1)? Show your work. (2 points)

Part II: Write two point-slope equations for the line passing through the points (6, 5) and (3, 1). Show your work. (4 points: 2 points per equation)



Answer :

Certainly! Let’s work through the problem step-by-step.

### Part I: Calculating the Slope

To determine the slope [tex]\( m \)[/tex] of the line passing through the points [tex]\((6, 5)\)[/tex] and [tex]\((3, 1)\)[/tex], we use the slope formula:

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

Here, [tex]\((x_1, y_1) = (6, 5)\)[/tex] and [tex]\((x_2, y_2) = (3, 1)\)[/tex].

Substituting these values into the slope formula:

[tex]\[ m = \frac{1 - 5}{3 - 6} = \frac{-4}{-3} = \frac{4}{3} \][/tex]

So, the slope of the line is:

[tex]\[ m = \frac{4}{3} \][/tex]

### Part II: Writing Two Point-Slope Form Equations

The point-slope form of the equation of a line is given by:

[tex]\[ y - y_1 = m(x - x_1) \][/tex]

We will write two equations using the given points [tex]\((6, 5)\)[/tex] and [tex]\((3, 1)\)[/tex].

#### Using the point [tex]\((6, 5)\)[/tex]:

Substitute [tex]\( x_1 = 6 \)[/tex], [tex]\( y_1 = 5 \)[/tex], and [tex]\( m = \frac{4}{3} \)[/tex] into the point-slope form:

[tex]\[ y - 5 = \frac{4}{3}(x - 6) \][/tex]

#### Using the point [tex]\((3, 1)\)[/tex]:

Substitute [tex]\( x_2 = 3 \)[/tex], [tex]\( y_2 = 1 \)[/tex], and [tex]\( m = \frac{4}{3} \)[/tex] into the point-slope form:

[tex]\[ y - 1 = \frac{4}{3}(x - 3) \][/tex]

### Summary:

1. Slope: [tex]\( m = \frac{4}{3} \)[/tex]
2. Point-slope equation using point [tex]\((6, 5)\)[/tex]:
[tex]\[ y - 5 = \frac{4}{3}(x - 6) \][/tex]
3. Point-slope equation using point [tex]\((3, 1)\)[/tex]:
[tex]\[ y - 1 = \frac{4}{3}(x - 3) \][/tex]

These are the detailed steps to calculate the slope and to write the two point-slope form equations for the line passing through the given points.