Math Problem Statement

write slope intercept form for through: (-3,1) and (0,-5)

Solution

To find the slope-intercept form y=mx+by = mx + b of the line passing through the points (3,1)(-3, 1) and (0,5)(0, -5), follow these steps:

Step 1: Find the slope mm

The formula for slope is: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Substituting the given points (3,1)(-3, 1) and (0,5)(0, -5): m=510(3)=63=2m = \frac{-5 - 1}{0 - (-3)} = \frac{-6}{3} = -2

Step 2: Use the slope-intercept form y=mx+by = mx + b

We know the slope m=2m = -2. To find bb (the y-intercept), substitute one point into the equation. Using (0,5)(0, -5), where x=0x = 0 and y=5y = -5: 5=2(0)+b-5 = -2(0) + b b=5b = -5

Step 3: Write the equation

Substitute m=2m = -2 and b=5b = -5 into y=mx+by = mx + b: y=2x5y = -2x - 5

Final Answer:

The slope-intercept form of the line is: y=2x5y = -2x - 5

Would you like to see a graph or further details about how to check this result?


  1. How do we find the slope if given different points?
  2. What is the meaning of bb (the y-intercept)?
  3. How does changing the slope affect the graph?
  4. Can we rewrite this equation in standard form?
  5. How can we verify the line passes through both points?

Tip: Always double-check your slope calculation to avoid sign errors!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Coordinate Geometry

Formulas

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

Theorems

Point-Slope Theorem
Slope-Intercept Equation of a Line

Suitable Grade Level

Grades 8-10