f(x) = m * x + b
Author
How do i solve for
f(45) = 15 = m * 45 + b
f(135) = 5 = m * 135 + b
What is the equation.... school has been too long!
Thanks
5 = m*135 + b
<=> b = 5-m*135
Put into other equation:
15 = m*45 + 5-m*135
<=> 15= -90*m + 5
<=> -10/90= m
<=> m = -1/9
5 = m*135 + b
<=> b = 5-m*135 = 20
[edited by - L0rdy on August 1, 2003 6:13:43 PM]
[edited by - L0rdy on August 1, 2003 6:16:58 PM]
<=> b = 5-m*135
Put into other equation:
15 = m*45 + 5-m*135
<=> 15= -90*m + 5
<=> -10/90= m
<=> m = -1/9
5 = m*135 + b
<=> b = 5-m*135 = 20
[edited by - L0rdy on August 1, 2003 6:13:43 PM]
[edited by - L0rdy on August 1, 2003 6:16:58 PM]
f(45) = 15 = m * 45 + b
f(135) = 5 = m * 135 + b
135m-45m=-10 - because difference...you know
90m=-10
m=-1/9
b=20
f(135) = 5 = m * 135 + b
135m-45m=-10 - because difference...you know
90m=-10
m=-1/9
b=20
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