Math Problem Statement

Which equation describes the line that passes through the point (1, 6) and is parallel to the line 2x + y = 3?

Solution

The given problem asks for the equation of a line that passes through the point (1,6)(1, 6) and is parallel to the line 2x+y=32x + y = 3.

Step 1: Find the slope of the given line.

We can rewrite the given line 2x+y=32x + y = 3 in slope-intercept form y=mx+by = mx + b, where mm is the slope.

2x+y=3    y=2x+32x + y = 3 \implies y = -2x + 3

The slope mm of the line is 2-2.

Step 2: Use the slope-point form to find the equation of the new line.

Since the line we're looking for is parallel to 2x+y=32x + y = 3, it will have the same slope of 2-2. Using the point-slope form of a line equation:

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

Substituting the slope m=2m = -2 and the point (x1,y1)=(1,6)(x_1, y_1) = (1, 6):

y6=2(x1)y - 6 = -2(x - 1)

Simplifying:

y6=2x+2y - 6 = -2x + 2 y=2x+8y = -2x + 8

Step 3: Convert back to standard form.

We can rearrange the equation y=2x+8y = -2x + 8 to standard form by moving all terms to one side:

2xy=82x - y = 8

Conclusion:

The correct equation is 2xy=82x - y = 8, which corresponds to option C.

Would you like further details or have any questions? Here are 5 related questions:

  1. How do you determine the slope of a line from its equation?
  2. How do you find the equation of a line passing through two points?
  3. What changes in the equation of a line if it's perpendicular instead of parallel to another line?
  4. How can you convert between point-slope and slope-intercept forms?
  5. How do you determine the y-intercept of a line given its slope and a point?

Tip: The slope of parallel lines is always equal, while perpendicular lines have slopes that are negative reciprocals of each other.

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Math Problem Analysis

Mathematical Concepts

Linear equations
Slopes
Parallel lines

Formulas

Slope-point form equation: y - y1 = m(x - x1)
Standard form of a line equation: Ax + By = C

Theorems

Parallel lines have equal slopes

Suitable Grade Level

Grades 8-10