<span>Solving for the slope using points ( (−4, 15), (0, 5)</span>
M = ( 15 – 5) / ( -4 – 0) = -5 / 2
Solving for b
<span>
Y = mx + b</span>
5 = 0(-5/2) + b
B = 5
So the linear function is
<span>Y = (-5/2) x + 5</span>
In the general case, it is (x, y+3), where y = f(x).
Let:
100%---------------->24h
30%------------------>xh
Using cross multiplication:
The answer is 3.5 & 355 because the decimal shifts to the left or right, you move the decimal in the answer too.