Math Problem Statement

A line passes through the point (-8, 5) and has a slope of -3/4

Write an equation in point-slope form for this line.

Solution

To write the equation of a line in point-slope form, we 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.

Given:

  • The point (8,5)(-8, 5),
  • The slope m=34m = -\frac{3}{4},

Substituting these values into the point-slope form:

y5=34(x+8)y - 5 = -\frac{3}{4}(x + 8)

This is the equation of the line in point-slope form.

Would you like to go into more detail about how to convert this into slope-intercept form or explore a related topic?

Here are five questions related to this concept:

  1. How do you convert the point-slope form to the slope-intercept form?
  2. What is the slope-intercept form of the equation derived above?
  3. How do you find the equation of a line parallel to this line?
  4. What is the y-intercept of the line described by this equation?
  5. How can you determine the x-intercept of this line?

Tip: The point-slope form is particularly useful when you know a point on the line and the slope, as it directly incorporates this information into the equation.

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Math Problem Analysis

Mathematical Concepts

Geometry
Linear Equations

Formulas

Point-slope form of a line: y - y1 = m(x - x1)

Theorems

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Suitable Grade Level

Grades 7-9