Math Problem Statement

Graph this line: y–1=– 2(x+1)

Solution

To graph the equation y1=2(x+1)y - 1 = -2(x + 1), let's first rewrite it in slope-intercept form y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.

Step 1: Simplify the equation

Starting with: y1=2(x+1)y - 1 = -2(x + 1) Distribute the 2-2 on the right-hand side: y1=2x2y - 1 = -2x - 2 Now, add 1 to both sides to solve for yy: y=2x1y = -2x - 1

Step 2: Identify the slope and y-intercept

The equation is now in the form y=mx+by = mx + b, where:

  • Slope m=2m = -2
  • Y-intercept b=1b = -1

This means the line has a slope of -2 (it falls 2 units for every 1 unit moved to the right) and crosses the y-axis at y=1y = -1.

Step 3: Graph the line

  1. Start at the y-intercept: point (0,1)(0, -1).
  2. From this point, use the slope 2-2 to find another point: move down 2 units and right 1 unit, landing at (1,3)(1, -3).
  3. Connect these two points with a straight line.

Would you like a visual of the graph, or any additional details on how to interpret the slope or intercept?

Here are 5 related questions to explore further:

  1. How do you interpret the slope of a line geometrically?
  2. How does changing the slope of the line affect its steepness?
  3. What happens if the y-intercept is positive or zero?
  4. How do you graph a line from an equation in point-slope form?
  5. How do you find the x-intercept of a line?

Tip: If the slope is negative, the line will slope downward as you move from left to right across the graph.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope formula
Y-intercept

Suitable Grade Level

Grades 7-9