writing equations in slope intercept form y = mx + b slope or rate of change y intercept
Post on 18-Dec-2015
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Writing equations in
slope intercept formY = mX + b
Slopeor
Rate of change
Y intercept
X
Y
4
5
The line has a negative trendSo the slope is - ⅘
The y intercept is at 0, -3
So the equation for the line is……
Y = -⅘X - 3
X
Y
4
12The line has a positive trend So the slope is ⁴⁄₁₂ = ⅓ The y intercept is at 0, 6So the equation for the line is……
Y = ⅓X + 6
X
Y
2
1
The line has a positive trend So the slope is ²⁄₁ = 2
The y intercept is at 0, 1
So the equation for the line is……
Y = 2X + 1
X
Y
2
3The line has a negative trendSo the slope is - ⅔
The y intercept is at 0, -1
So the equation for the line is……
Y = -⅔X - 1
X
YY = ½X + 6
Y = ½X + 0
Y = ½X - 4
Parallel lines will ALWAYSHave the same slope
X
Y
Horizontal line Y = 2
X
Y
Vertical lineX = - 5
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