SOLUTION: Write an equation of the line containing the given point and parellel to the given line. Express your answer in the form y=mx+b. (-6,8); 8x=7y+4

Algebra ->  Linear-equations -> SOLUTION: Write an equation of the line containing the given point and parellel to the given line. Express your answer in the form y=mx+b. (-6,8); 8x=7y+4      Log On


   



Question 574774: Write an equation of the line containing the given point and parellel to the given line. Express your answer in the form y=mx+b.
(-6,8); 8x=7y+4

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
You can start with the fact that parallel lines have identical slopes.
Find the slope of the line given by the equation:
8x = 7y+4 Convert to slope-intercept form:
highlight%28y+=+%288%2F7%29x-4%2F7%29 So the slope is m+=+8%2F7
The new equation will start out as:
y = (8/7)x+b
Now find the value of b by substituting the x- and y-coordinates of the given point (-6, 8)
8 = (8/7)(-6)+b Simplify.
8 = -48/7 + b Solve for b.
b = 8+48/7
b = 56/7+48/7
b = 104/7
The final equation is:
highlight_green%28y+=+%288%2F7%29x%2B104%2F7%29