Math Problem Statement

find the equation of this function

Find the equation of this function

Solution

The graph shows a straight line passing through two points. To find the equation of the line, we need to:

  1. Identify the coordinates of two points on the line.
  2. Use the slope-intercept form of a line equation: y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.

Step 1: Identify Points

The two points on the line are approximately:

  • Point 1: (5,10)(-5, 10)
  • Point 2: (1,0)(1, 0)

Step 2: Calculate the Slope mm

The slope mm is calculated as: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Using the points (5,10)(-5, 10) and (1,0)(1, 0): m=0101(5)=106=53m = \frac{0 - 10}{1 - (-5)} = \frac{-10}{6} = -\frac{5}{3}

Step 3: Equation in Point-Slope Form

Using point-slope form of the equation, we substitute one point (let's use (1,0)(1, 0)) and the slope: yy1=m(xx1)y - y_1 = m(x - x_1) y0=53(x1)y - 0 = -\frac{5}{3}(x - 1) y=53x+53y = -\frac{5}{3}x + \frac{5}{3}

This is the equation of the line. Let me know if you want more details or have any questions!

Here are some related questions:

  1. How do we calculate the y-intercept from the equation of a line?
  2. What is the difference between point-slope form and slope-intercept form?
  3. Can we use other points on the graph to confirm the equation?
  4. How do we interpret the slope in real-world situations?
  5. What happens if the line is vertical or horizontal?

Tip: For any straight line, the slope is constant, which means any two points can be used to find the equation!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions

Formulas

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

Theorems

Slope of a line theorem

Suitable Grade Level

Grades 8-10