Learning Task 3: RELATION AND FUNCTION
A.Change the following into the form of f(x) = mx+b
1.y - 3x = 7
2.2x + 4y = 8
3.-3 + y = 5
4.y + 5 = -2x
5.3x + 2y -4 = 0
Answers
Given :
1. y - 3x = 7
2. 2x + 4y = 8
3. -x + y = 5
4. y + 5 = -2x
5. 3x + 2y - 4 = 0
To Find : Change into the form of f(x) = mx + b
Solution:
f(x) = mx + b
f(x) = y
y = mx + b
1. y - 3x = 7
=> y = 3x + 7
=> f(x) = 3x + 7
2. 2x + 4y = 8
=> 4y = -2x + 8
=> y = -x/2 + 2
=> f(x) = (-1/2)x + 2
3. -x + y = 5
y = x + 5
=> f(x) = 1.x + 5
4. y + 5 = -2x
=> y = 2x - 5
=> f(x) = 2.x + (-5)
5. 3x + 2y - 4 = 0
2y = -3x + 4
=> y = -3x/2 + 2
=> f(x) = -(3/2)x + 2
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