Math Problem Statement

Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form

yequals=mxplus+b.

​(negative 2−2​,22​);

88xequals=99yplus+5

Solution

To find the equation of the line that passes through the point (2,2)(-2, 2) and is parallel to the line 8x=9y+58x = 9y + 5, follow these steps:

Step 1: Rewrite the given line in slope-intercept form (y=mx+by = mx + b)

Start by converting the given equation 8x=9y+58x = 9y + 5 into slope-intercept form:

8x=9y+58x = 9y + 5

Subtract 5 from both sides to isolate the 9y9y term:

8x5=9y8x - 5 = 9y

Now, divide both sides by 9 to solve for yy:

y=89x59y = \frac{8}{9}x - \frac{5}{9}

This gives us the slope m=89m = \frac{8}{9}.

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

Since the new line is parallel to the given line, it will have the same slope m=89m = \frac{8}{9}. We can use the point-slope form of the line equation, which is:

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

Where (x1,y1)=(2,2)(x_1, y_1) = (-2, 2). Substitute the values:

y2=89(x+2)y - 2 = \frac{8}{9}(x + 2)

Step 3: Simplify to slope-intercept form (y=mx+by = mx + b)

Distribute the slope 89\frac{8}{9} on the right side:

y2=89x+89×2y - 2 = \frac{8}{9}x + \frac{8}{9} \times 2

y2=89x+169y - 2 = \frac{8}{9}x + \frac{16}{9}

Now, add 2 to both sides to solve for yy (remember that 2 is equivalent to 189\frac{18}{9} in terms of ninths):

y=89x+169+189y = \frac{8}{9}x + \frac{16}{9} + \frac{18}{9}

y=89x+349y = \frac{8}{9}x + \frac{34}{9}

Final Answer:

The equation of the line in the form y=mx+by = mx + b is:

y=89x+349y = \frac{8}{9}x + \frac{34}{9}

Would you like more details or have any questions?

Here are some related questions:

  1. How do you find the slope of a line given two points?
  2. How can you determine if two lines are perpendicular?
  3. What is the point-slope form of a linear equation?
  4. How do you convert a linear equation from slope-intercept form to standard form?
  5. What is the significance of the y-intercept in a linear equation?

Tip: When given a problem involving parallel lines, remember that they always share the same slope.

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Math Problem Analysis

Mathematical Concepts

Linear equations
Parallel lines
Slope-intercept form

Formulas

Point-slope form of a line equation

Theorems

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Suitable Grade Level

Grades 9-12