Math Problem Statement

What is the equation of the line that passes through the point left parenthesis, minus, 3, comma, 2, right parenthesis(−3,2) and has a slope of minus, 3−3?

Solution

The equation of a line can be written in point-slope form as:

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

where:

  • mm is the slope,
  • (x1,y1)(x_1, y_1) is a point on the line.

You are given:

  • Slope m=3m = -3,
  • A point on the line (3,2)(-3, 2).

Substitute these values into the point-slope form:

y2=3(x(3))y - 2 = -3(x - (-3)) y2=3(x+3)y - 2 = -3(x + 3)

Now, simplify:

y2=3x9y - 2 = -3x - 9 y=3x9+2y = -3x - 9 + 2 y=3x7y = -3x - 7

Thus, the equation of the line is:

y=3x7y = -3x - 7

Do you want more details or have any questions about this? Here are some related questions:

  1. How do you convert point-slope form to slope-intercept form?
  2. What is the significance of the slope in a linear equation?
  3. How do you find the slope between two points?
  4. Can a line have an undefined slope? If so, what does that mean geometrically?
  5. How would the equation change if the point was different, but the slope stayed the same?

Tip: Always remember that the slope mm represents how steep the line is, and a negative slope means the line is decreasing as you move to the right.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Point-Slope Form
Slope-Intercept Form

Formulas

Point-slope form: y - y1 = m(x - x1)
Slope-intercept form: y = mx + b

Theorems

Linear equation theorem: A line is uniquely determined by a point and a slope

Suitable Grade Level

Grades 8-10