Math Problem Statement

Hver er jafna línunnar á myndinni hér fyrir neðan?

Hver er jafna línunnar á myndinni hér fyrir neðan?

Solution

To identify the equation of the line shown on the graph, let's analyze its slope and y-intercept:

  1. Slope: The line is rising from left to right, indicating a positive slope. Observing the angle, it appears relatively steep but not as steep as the equation y=3x+2y = 3x + 2.

  2. Y-intercept: The line crosses the y-axis above zero. By inspecting the position, it appears to cross at approximately y=1.5y = -1.5, aligning well with the y-intercept of equation G:y=2x1.5G: y = 2x - 1.5.

  3. Confirmation:

    • The line has a positive slope, and G:y=2x1.5G: y = 2x - 1.5 is the only equation with a slope of 2 and a y-intercept of -1.5, which matches the graph.

Thus, the equation of the line in the graph is:

G: y=2x1.5\text{G: } y = 2x - 1.5

Would you like further details or have any questions?


Here are some related questions for further practice:

  1. What would the line look like if the slope were negative?
  2. How would the line shift if we changed the y-intercept to a positive number?
  3. What is the effect of doubling the slope on the graph of a line?
  4. How do we determine the equation of a line from two points on the line?
  5. How would the equation change if the line were parallel but had a different y-intercept?

Tip: For linear equations, the slope-intercept form y=mx+by = mx + b quickly shows the slope mm and y-intercept bb, making graph analysis straightforward.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graph Analysis

Formulas

Slope-intercept form y = mx + b

Theorems

-

Suitable Grade Level

Grades 8-10