Math Problem Statement

Four different linear functions are represented. Answer questions based on the graph, table, and equations given for the functions.

Solution

Let's go through each question step-by-step using the information given for the four functions.

Analysis of Each Function:

  1. Function 1: The graph shows a line with a negative slope. We can observe that the slope appears to be less steep than Function 3 (which has a slope of -5).
  2. Function 2: Given as a table of points. We can calculate the slope by finding the difference in yy-values over the difference in xx-values. For example: slope=8(12)1(2)=41=4\text{slope} = \frac{-8 - (-12)}{-1 - (-2)} = \frac{4}{1} = 4 So, the slope of Function 2 is 4.
  3. Function 3: Defined by the equation y=5x2y = -5x - 2, where the slope is -5, which is steep and negative.
  4. Function 4: Defined with a slope of 2 and a yy-intercept of 3.

Solving Each Part:

(a) Which function’s graph is the steepest?

  • Answer: The steepest slope in terms of magnitude is -5 in Function 3. Thus, Function 3 is the steepest.

(b) Which functions have graphs with yy-intercepts greater than 3-3?

  • Function 1: Observing the graph, the yy-intercept appears to be at -2.

  • Function 2: From the table, when x=0x = 0, y=4y = -4, which is less than -3.

  • Function 3: The equation y=5x2y = -5x - 2 has a yy-intercept of -2.

  • Function 4: The yy-intercept is 3.

  • Answer: Function 1, Function 3, and Function 4 have yy-intercepts greater than -3.


(c) Which function has the graph with a yy-intercept farthest from 0?

  • yy-intercepts:
    • Function 1: -2
    • Function 2: -4
    • Function 3: -2
    • Function 4: 3

The yy-intercept farthest from 0 in absolute value is -4 from Function 2.


Final Answers:

  • (a): Function 3
  • (b): Functions 1, 3, and 4
  • (c): Function 2

Would you like more details on any of these calculations?


Here are some related questions to further your understanding:

  1. How do we find the slope between two points on a line?
  2. What does the steepness of a line signify in real-world terms?
  3. How do we determine a line's intercept from its graph?
  4. Why is the absolute value important in determining the farthest distance from 0?
  5. What are the characteristics of a line with a positive slope versus a negative slope?

Tip: To identify the steepest graph, always compare the absolute values of the slopes. The higher the absolute value, the steeper the line.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Slope and Intercept
Absolute Value

Formulas

Slope formula: (y2 - y1) / (x2 - x1)
y-intercept from linear equations

Theorems

Slope-Intercept Form

Suitable Grade Level

Grade 8