Math Problem Statement

Select the correct answers using the equations given. The equation provided is: y = -2x + 7. Determine the slope, y-intercept, x-intercept, and if the graph is horizontal, vertical, increasing, or decreasing.

Solution

The equation in the problem is:

y=2x+7y = -2x + 7

From this, we can analyze the following:

  1. Slope: The slope mm is the coefficient of xx, which is 2-2.

  2. y-intercept: The yy-intercept occurs when x=0x = 0. The equation simplifies to y=7y = 7, so the yy-intercept is 7.

  3. x-intercept: To find the xx-intercept, set y=0y = 0 and solve for xx: 0=2x+7    2x=7    x=720 = -2x + 7 \implies 2x = 7 \implies x = \frac{7}{2} So, the xx-intercept is 72\frac{7}{2}.

  4. Graph's Behavior:

    • The slope is negative (2-2), which means the graph is decreasing.
    • Since the slope is not zero, the graph is neither horizontal nor vertical.

Summary:

  • Slope: 2-2
  • yy-intercept: 77
  • xx-intercept: 72\frac{7}{2}
  • The graph is decreasing.

Would you like more details on any of these points?

Here are 5 related questions:

  1. How do you find the slope of a line from an equation?
  2. What is the significance of the yy-intercept in a linear equation?
  3. How does the slope determine whether a line is increasing or decreasing?
  4. How do you calculate the xx-intercept for any linear equation?
  5. What does a horizontal or vertical line look like in slope-intercept form?

Tip: The slope can be visualized as the "steepness" of a line; a negative slope means the line goes down as you move to the right.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form
Graphing

Formulas

Slope-Intercept Form: y = mx + b
x-intercept: Set y = 0 and solve for x

Theorems

Slope Theorem: A negative slope means a line is decreasing.
Intercept Theorem: The x- and y-intercepts show where the graph crosses the axes.

Suitable Grade Level

Grades 7-10