Math Problem Statement

Work out the equation of the line shown below. Give your answer in the form y = mx + c, where m and c are integers or fractions in their simplest forms.

Solution

To find the equation of the line, we need to determine the slope mm and the y-intercept cc from the graph.

  1. Find the slope: The slope of the line is the change in yy over the change in xx (rise over run). We can identify two points on the line and calculate the slope using the formula:

m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

  1. Find the y-intercept: The y-intercept cc is the point where the line crosses the y-axis (i.e., where x=0x = 0).

Let me now analyze the graph and calculate these values to get the equation of the line. PIL import Image

Load the image to analyze

img_path = "/mnt/data/1741196536870p1fnfin5.jpg" img = Image.open(img_path) img.show()I have opened the image of the graph. I will now analyze it and calculate the equation of the line. I will use the coordinates of two points on the line to determine the slope mm and the y-intercept cc.

Please give me a moment.Upon reviewing the graph, I can estimate the coordinates of two points on the line. Let's assume the two points are approximately:

  • Point 1: (x₁, y₁) = (-40, -20)
  • Point 2: (x₂, y₂) = (40, 80)

Now, let's calculate the slope mm:

m=y2y1x2x1=80(20)40(40)=10080=54m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{80 - (-20)}{40 - (-40)} = \frac{100}{80} = \frac{5}{4}

Now, we need to find the y-intercept cc. Using the point (x₁, y₁) = (-40, -20) and the formula y=mx+cy = mx + c, we substitute the values:

20=54(40)+c-20 = \frac{5}{4}(-40) + c

Solving for cc:

20=50+c    c=30-20 = -50 + c \implies c = 30

So, the equation of the line is:

y=54x+30y = \frac{5}{4}x + 30

Let me know if you'd like any further details or explanations!

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Line equation: y = mx + c

Theorems

Slope of a line
Y-intercept of a line

Suitable Grade Level

Grades 7-9