Math Problem Statement

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Compare the slopes and y-intercepts of two functions: the graph of f(x) and the equation g(x) = -2x + 3.

Solution

Let's break this problem down step-by-step.

We are given two functions:

  1. The function in the graph appears to be f(x)f(x), and we are tasked with identifying its slope and y-intercept.
  2. The second function provided in the equation form is g(x)=2x+3g(x) = -2x + 3.

Comparing the slopes:

  1. For the graph function f(x)f(x):

    • By observing the graph, the line has a negative slope. To calculate the slope, we look at two points on the graph: one at (0,3)(0, 3) (the y-intercept) and another at (5,5)(-5, 5).
    • Slope formula: m=y2y1x2x1=5350=25=25m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{5 - 3}{-5 - 0} = \frac{2}{-5} = -\frac{2}{5}.
    • So, the slope of f(x)f(x) is 25-\frac{2}{5}.
  2. For the function g(x)=2x+3g(x) = -2x + 3:

    • The slope is clearly 2-2 because the equation is in slope-intercept form, y=mx+by = mx + b, where mm is the slope.

Comparing the y-intercepts:

  1. For f(x)f(x):

    • From the graph, the y-intercept occurs at (0,3)(0, 3), meaning the y-intercept is 3.
  2. For g(x)=2x+3g(x) = -2x + 3:

    • The y-intercept is also 3 because the equation g(x)=2x+3g(x) = -2x + 3 shows that when x=0x = 0, g(0)=3g(0) = 3.

Conclusion:

  • The slopes are different: 25-\frac{2}{5} for f(x)f(x) and 2-2 for g(x)g(x).
  • The y-intercepts are the same: 3 for both functions.

Therefore, the correct answer is D. The slopes are different but the y-intercepts are the same.


Would you like more details on the slope calculation or how to interpret the graph?

Here are 5 follow-up questions that you might find helpful:

  1. What does the slope of a line tell us about the graph?
  2. How do you find the slope of a line from two points on the graph?
  3. What is the significance of the y-intercept in a linear equation?
  4. How would the graph of g(x)=2x+3g(x) = -2x + 3 look compared to f(x)f(x)?
  5. Can you explain the difference between positive and negative slopes?

Tip: Always remember that the slope of a line measures its steepness, and a negative slope indicates a line that falls as you move from left to right!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Graph Interpretation

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Slope-intercept form: y = mx + b

Theorems

Slope-intercept theorem
Linear equation properties

Suitable Grade Level

Grades 8-10