SOLUTION: write an equation of the line that passes through the point and has the specified slope. Sketch the line. (2,4) m=-0.8

Algebra ->  Linear-equations -> SOLUTION: write an equation of the line that passes through the point and has the specified slope. Sketch the line. (2,4) m=-0.8      Log On


   

Question 131552: write an equation of the line that passes through the point and has the specified slope. Sketch the line. (2,4) m=-0.8
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The line will have the form y+=+mx+%2B+b where m= slope
m+=+-.8
P(2,4)
y+=+-.8x+%2B+b
Now plug in x = 2 and y = 4 to find b
4+=+-.8%2A2+%2B+b
4+=+-1.6+%2B+b
add 1.6 to both sides
b+=+4+%2B+1.6
b+=+5.6
y+=+-.8x+%2B+5.6 answer
check:
does line go through (2,4)?
y+=+-.8x+%2B+5.6
4+=+%28-.8%29%2A2+%2B+5.6
4+=+-1.6+%2B+5.6
4+=+4
OK