Math Problem Statement

What is the equation for the line in slope-intercept form?   Enter your answer in the box.

What is the equation for the line in slope-intercept form?

Solution

To find the equation of the line in slope-intercept form (y = mx + b), we need to determine two things from the graph:

  1. Slope (m): The slope is the ratio of the vertical change (rise) to the horizontal change (run). We can calculate the slope by picking two points on the line and finding the difference in their y-values divided by the difference in their x-values.
  2. Y-intercept (b): The y-intercept is the point where the line crosses the y-axis, which is where x = 0.

Let me analyze the graph to calculate these values and determine the equation of the line.Upon closely examining the graph:

  1. Two points on the line are clearly visible: one at (0,4)(0, -4) and another at (2,4)(2, 4).
  2. Slope (m): The slope is calculated as the change in yy divided by the change in xx. Using the points (0,4)(0, -4) and (2,4)(2, 4):

m=4(4)20=82=4m = \frac{4 - (-4)}{2 - 0} = \frac{8}{2} = 4

  1. Y-intercept (b): From the graph, the line crosses the y-axis at y=4y = -4, so b=4b = -4.

Thus, the equation of the line is:

y=4x4y = 4x - 4

This is the equation in slope-intercept form.

Would you like further details or clarification? Here are some related questions for you:

  1. How can you graph a line given its equation in slope-intercept form?
  2. What is the significance of the slope in real-world scenarios?
  3. How would you calculate the slope of a line from two points if the points have negative coordinates?
  4. What happens to the equation of a line if the slope is zero?
  5. How do you convert the equation of a line to standard form?

Tip: Always pick two clear points on the line to calculate the slope accurately!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope formula (m = (y2 - y1) / (x2 - x1))

Suitable Grade Level

Grades 7-10