Math Problem Statement

What is the equation of the line in point-slope form?

Solution

To find the equation of the line in point-slope form, we need to determine two main components: the slope of the line and a point on the line, as point-slope form is given by:

yy1=m(xx1)y - y_1 = m(x - x_1)

where (x1,y1)(x_1, y_1) is a point on the line, and mm is the slope.

Step 1: Identify a Point on the Line

The red point on the graph is located at (0,2)(0, 2).

Step 2: Calculate the Slope

To find the slope mm, we need two points on the line. From the graph, we can identify the red point (0,2)(0, 2) and another point, such as (8,0)(8, 0), where the line crosses the x-axis.

The slope formula is:

m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

Using the points (0,2)(0, 2) and (8,0)(8, 0):

m=0280=28=14m = \frac{0 - 2}{8 - 0} = \frac{-2}{8} = -\frac{1}{4}

Step 3: Write the Equation in Point-Slope Form

Now, we substitute the red point (0,2)(0, 2) and the slope 14-\frac{1}{4} into the point-slope form:

y2=14(x0)y - 2 = -\frac{1}{4}(x - 0)

or simply:

y2=14xy - 2 = -\frac{1}{4}x

This is the equation of the line in point-slope form.

Would you like more details or have any questions?

Here are some related questions for practice:

  1. How would you convert this equation to slope-intercept form?
  2. What is the slope of a line perpendicular to this one?
  3. How would you find the y-intercept of this line?
  4. What is the equation in point-slope form if a different point on the line was used?
  5. How can we find the x-intercept from this equation?

Tip: In point-slope form, use any point on the line and the slope to write the equation quickly.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Coordinate Geometry

Formulas

Point-slope form y - y1 = m(x - x1)
Slope formula m = (y2 - y1) / (x2 - x1)

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 8-10