Math Problem Statement

consider the lines y=1/2x and y=4-8x which line has the greater slope and which line has the greater y-intercept?

Solution

To compare the lines y=12xy = \frac{1}{2}x and y=48xy = 4 - 8x, we need to examine their slopes and y-intercepts.

  1. Slope:

    • The slope of a line in the equation y=mx+by = mx + b is given by mm.
    • For y=12xy = \frac{1}{2}x, the slope is 12\frac{1}{2}.
    • For y=48xy = 4 - 8x, rewriting it as y=8x+4y = -8x + 4, the slope is 8-8.

    Conclusion:

    • The line y=12xy = \frac{1}{2}x has a slope of 12\frac{1}{2}.
    • The line y=48xy = 4 - 8x has a slope of 8-8.
    • Therefore, the line y=12xy = \frac{1}{2}x has the greater slope (since 12\frac{1}{2} is larger than 8-8).
  2. Y-intercept:

    • The y-intercept in the equation y=mx+by = mx + b is given by bb.
    • For y=12xy = \frac{1}{2}x, the y-intercept is 0 (since there's no constant term).
    • For y=48xy = 4 - 8x, the y-intercept is 4.

    Conclusion:

    • The line y=48xy = 4 - 8x has the greater y-intercept (4 compared to 0).

Summary:

  • The line with the greater slope is y=12xy = \frac{1}{2}x.
  • The line with the greater y-intercept is y=48xy = 4 - 8x.

Would you like more details or further explanation on any part of this?

Here are 5 related questions:

  1. How do you determine the slope of a line from its equation?
  2. What does the slope tell us about the steepness of a line?
  3. Can a line with a negative slope have a greater y-intercept?
  4. How would you graph these two lines?
  5. How do parallel lines compare in slope?

Tip: A line's slope represents its steepness, with positive slopes going upward from left to right and negative slopes going downward.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slopes
Y-intercepts

Formulas

Slope-intercept form y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10