Math Problem Statement

Graph each of these linear functions on the coordinate system that has been provided. Do not generate a table of values. (a) y = (2/5)x - 2, (b) y = -(3/2)x + 4.

Solution

To solve this problem, we need to graph the two linear equations on a coordinate system based on their slope-intercept form y=mx+by = mx + b, where:

  • mm is the slope.
  • bb is the y-intercept.

Given Equations:

  1. y=25x2y = \frac{2}{5}x - 2

    • Slope (mm) = 25\frac{2}{5}
    • Y-intercept (bb) = 2-2
  2. y=32x+4y = -\frac{3}{2}x + 4

    • Slope (mm) = 32-\frac{3}{2}
    • Y-intercept (bb) = 44

Steps to Graph:

  1. For Equation (a):

    • Plot the y-intercept (2)(-2) on the y-axis.
    • Use the slope m=25m = \frac{2}{5} to determine the rise over run:
      • From the point (0,2)(0, -2), go up 2 units (rise) and right 5 units (run).
    • Plot another point and draw a straight line through these two points.
  2. For Equation (b):

    • Plot the y-intercept 44 on the y-axis.
    • Use the slope m=32m = -\frac{3}{2} (negative slope):
      • From (0,4)(0, 4), go down 3 units (rise) and right 2 units (run).
    • Plot another point and draw a straight line through these two points.

I will now create and display the graph.import matplotlib.pyplot as plt import numpy as np

Define the equations

x = np.linspace(-10, 10, 400)

First equation: y = (2/5)x - 2

y1 = (2/5) * x - 2

Second equation: y = -(3/2)x + 4

y2 = -(3/2) * x + 4

Plot the lines

plt.figure(figsize=(8, 6))

Plot first equation

plt.plot(x, y1, label=r"$y = \frac{2}{5}x - 2$", color="blue")

Plot second equation

plt.plot(x, y2, label=r"$y = -\frac{3}{2}x + 4$", color="red")

Add axes

plt.axhline(0, color='black',linewidth=0.8) plt.axvline(0, color='black',linewidth=0.8)

Add grid, labels, legend

plt.grid(color='gray', linestyle='--', linewidth=0.5) plt.title("Graph of Linear Functions") plt.xlabel("x-axis") plt.ylabel("y-axis") plt.legend() plt.show() <<ImageDisplayed>>successHere is the graph of the two linear functions:

  1. The blue line represents y=25x2y = \frac{2}{5}x - 2.
  2. The red line represents y=32x+4y = -\frac{3}{2}x + 4.

These lines are drawn based on their slopes and y-intercepts.

Let me know if you have any questions or need further details. Here are some related questions to deepen your understanding:

  1. How can you determine the slope from a linear equation in slope-intercept form?
  2. What happens to a line's graph if you change the slope to a steeper value?
  3. How can you find the intersection point of two linear equations algebraically?
  4. What is the significance of the y-intercept in a graph, and how can you use it?
  5. How would the graph change if you multiplied the slope of each equation by 1-1?

Tip: When graphing, always verify points by substituting into the equation to ensure accuracy!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Concept of Slope
Intercept Definition

Suitable Grade Level

Grades 8-10