Math Problem Statement

Graph the function f(x) = (1/4)x + 3. Use the line tool to draw the line x = -4 and then use the dot tool to graph the point (-4, f(-4)).

Solution

It looks like you are working on a graphing problem based on the function f(x)=14x+3f(x) = \frac{1}{4}x + 3. The problem asks you to:

  1. Graph the line of the given function.
  2. Draw the vertical line x=4x = -4.
  3. Graph the point (4,f(4))(-4, f(-4)).

Let's break this down:

  1. Function Graph f(x)=14x+3f(x) = \frac{1}{4}x + 3:

    • The slope of the line is 14\frac{1}{4}, meaning that for every increase of 1 unit in xx, yy increases by 14\frac{1}{4}.
    • The y-intercept is 3, so the line crosses the y-axis at (0,3)(0, 3).
  2. Evaluate f(4)f(-4): f(4)=14(4)+3=1+3=2f(-4) = \frac{1}{4}(-4) + 3 = -1 + 3 = 2 So, the point (4,f(4))(-4, f(-4)) is (4,2)(-4, 2).

  3. Plotting the Line x=4x = -4:

    • This is a vertical line that passes through x=4x = -4 on the graph. It will be a straight vertical line at that point.
  4. Plot the Point (4,2)(-4, 2):

    • Once you've drawn the vertical line, plot the point (4,2)(-4, 2) on the graph, which lies on the line of the function.

Would you like a more detailed breakdown of any part of this process or further clarification?

Here are five follow-up questions related to this problem:

  1. What does the slope 14\frac{1}{4} tell us about the steepness of the line?
  2. How would the graph change if the slope were negative?
  3. What if the y-intercept were shifted up or down?
  4. How do you interpret the point (4,2)(-4, 2) in relation to the graph?
  5. Can you predict the value of f(x)f(x) for other values of xx, like x=0x = 0 or x=4x = 4?

Tip: When graphing linear functions, always start by plotting the y-intercept and then use the slope to find additional points.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Slope and Intercept
Graphing

Formulas

f(x) = (1/4)x + 3
Slope formula: (y2 - y1) / (x2 - x1)

Theorems

Slope-Intercept Form: y = mx + b

Suitable Grade Level

Grades 9-10