Math Problem Statement

Write an equation of the line that passes through the given points.(-3,6​) and (1​,2​)

Solution

To find the equation of the line passing through the points (3,6)(-3, 6) and (1,2)(1, 2), we use the slope-intercept form of a line equation:

y=mx+by = mx + b

Step 1: Calculate the slope (mm)

The slope (mm) is calculated using the formula:

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

Substitute the points (3,6)(-3, 6) and (1,2)(1, 2):

m=261(3)=41+3=44=1m = \frac{2 - 6}{1 - (-3)} = \frac{-4}{1 + 3} = \frac{-4}{4} = -1

Step 2: Use the slope and a point to find the y-intercept (bb)

Substitute the slope m=1m = -1 and one of the points (e.g., (3,6)(-3, 6)) into the slope-intercept form y=mx+by = mx + b:

6=1(3)+b6 = -1(-3) + b

6=3+b6 = 3 + b

b=63=3b = 6 - 3 = 3

Step 3: Write the equation of the line

Now that we have m=1m = -1 and b=3b = 3, the equation of the line is:

y=x+3y = -x + 3

Final Answer:

The equation of the line is:

y=x+3y = -x + 3

Would you like more details or further clarification? Here are 5 related questions you might find interesting:

  1. How can you convert this equation to standard form?
  2. What is the perpendicular slope to this line?
  3. How do you graph the line given the equation y=x+3y = -x + 3?
  4. What is the equation of a line parallel to y=x+3y = -x + 3 passing through a different point?
  5. How can you find the distance between this line and a point not on the line?

Tip: Always verify your slope and intercept calculations by substituting the points back into the final equation!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

Properties of linear equations

Suitable Grade Level

Grades 8-10