Math Problem Statement

Point slope form: through: 3,-4 and 1,2

Solution

To find the equation of a line in point-slope form, we can use the formula:

yy1=m(xx1)y - y_1 = m(x - x_1)

Where:

  • (x1,y1)(x_1, y_1) is a point on the line.
  • mm is the slope of the line, which is given by the formula:

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

We are given two points: (3,4)(3, -4) and (1,2)(1, 2).

Step 1: Calculate the slope (mm).

m=2(4)13=2+413=62=3m = \frac{2 - (-4)}{1 - 3} = \frac{2 + 4}{1 - 3} = \frac{6}{-2} = -3

Step 2: Use the point-slope form with one of the points.

Let's use (3,4)(3, -4):

y(4)=3(x3)y - (-4) = -3(x - 3)

Simplifying:

y+4=3(x3)y + 4 = -3(x - 3)

This is the equation of the line in point-slope form. You can also use the point (1,2)(1, 2), and the result will be the same equation.

Would you like more details or have any questions?


Here are five related questions to explore further:

  1. How do you convert point-slope form to slope-intercept form?
  2. What is the slope-intercept form of this line?
  3. How do you find the equation of a line passing through one point with a given slope?
  4. How do you determine if two lines are parallel?
  5. How do you find the equation of a line that is perpendicular to this one?

Tip: Always double-check your slope calculation to avoid errors in the final equation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Point-Slope Form

Formulas

Point-slope form: y - y1 = m(x - x1)
Slope formula: m = (y2 - y1) / (x2 - x1)

Theorems

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Suitable Grade Level

Grades 8-10