Question

Write the equation in slope intercept form. The line with slope -1 that passes through (3,5)?

Answer 1

http://openstudy.com/study#/updates/554cca3ee4b075612122616a

Answer 2

use https://www.desmos.com/calculator

Answer 3

y=mx+b
we know that the slope is -1
y=-x+b
now plug in the given coordinates to find the b part of the equation
5=-(3)+b
solve for b

Answer 4

y = -x + 8

(-x is equivalent to -1)

Answer 5

y = mx + b
slope = -1
coordinates are (3,5)

3 will be plugged in the "x" because that is the x-coordinate and 5 will be plugged in the "y" because y is the y-coordinate. 3 will become -3 since the line has a slope of -1 which will be m.

5 = -(3) + b
+3 = +3 + b
(you would add both sides by 3 since -(3) would make it -3. That cancels out the three on the right side and you get your answer on the left)
8 = b