<span>We write pattern linear function
f(x) = ax + b
</span><span>Both points must be in one straight line so they can be used to lay the system of equations .
Points A=(4,4), B = (-1,5)
x y x y
</span>

<span>We insert the calculated a and b in the equation f(x) = ax + b
</span>

<span>Since a> 0, the function is decreasing</span>
Answer:
10
Step-by-step explanation:
It's the $10 that is to be added to the cost for each produced item.
Answer:
166 = total amount of money
Step-by-step explanation:
What we spent plus what we have left equal the total amount of money
128.15 + 37.85 = total amount of money
166 = total amount of money
The simplified expression is 7x+20