Math Problem Statement

y = 7x − 2

Solution

The equation y=7x2y = 7x - 2 represents a linear function. Let's analyze its components:

Key Features:

  1. Slope (m): The coefficient of xx is 7, which means the slope of the line is 7. This tells us that for every 1 unit increase in xx, yy will increase by 7 units.
  2. Y-intercept (b): The constant term is -2, which means the line crosses the y-axis at (0,2)(0, -2).
  3. Graph: Since the slope is positive, the line will slant upwards from left to right.

General Form:

The equation is in the slope-intercept form: y=mx+by = mx + b where:

  • m=7m = 7 (slope)
  • b=2b = -2 (y-intercept)

Example:

If you want to find the value of yy for x=3x = 3, you can substitute: y=7(3)2=212=19y = 7(3) - 2 = 21 - 2 = 19 So, when x=3x = 3, y=19y = 19.

Would you like more details or have any specific questions?

Related Questions:

  1. How would the graph change if the slope were negative?
  2. What are the coordinates of the x-intercept for this line?
  3. Can you write the equation in standard form?
  4. How do you determine the slope from a graph?
  5. What is the significance of the slope and y-intercept in a real-world scenario?

Tip:

When analyzing linear equations, always look at the slope to understand the rate of change and the y-intercept to know where the line crosses the y-axis.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

Slope-intercept form: y = mx + b

Theorems

Linear function properties

Suitable Grade Level

Grades 6-8