Math Problem Statement

Which of the following graphs represents the equation y = (2/5)x + 2?

Solution

The equation provided is y=25x+2y = \frac{2}{5}x + 2. This is in slope-intercept form, where the slope mm is 25\frac{2}{5} and the y-intercept is 22.

Let's break it down:

  1. Slope (m=25)\left( m = \frac{2}{5} \right): This tells us that for every increase of 5 units in the x-direction, the graph will rise by 2 units in the y-direction (a positive slope).
  2. Y-intercept (b = 2): The line crosses the y-axis at the point (0, 2).

Now, looking at the graphs:

  • We need to identify the graph that crosses the y-axis at y=2y = 2 and has a positive slope that rises to the right. From the four options:
    • Graph W matches this description: it crosses the y-axis at 2 and has a positive slope.

Thus, Graph W represents the equation y=25x+2y = \frac{2}{5}x + 2.

Would you like more details on the solution, or do you have any questions?


Here are 5 related questions you might want to explore:

  1. How do you find the slope from two points on a line?
  2. What is the significance of the y-intercept in real-life situations?
  3. How does the slope of a line affect the steepness of a graph?
  4. Can you convert an equation from slope-intercept form to standard form?
  5. What happens to a graph when the slope is negative?

Tip: The slope of a line tells you how the y-value changes with respect to the x-value. A larger slope means a steeper line.

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Math Problem Analysis

Mathematical Concepts

Slope-Intercept Form
Linear Equations
Graphing

Formulas

y = mx + b

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 8-10