Expand the following expression by using distributive method. 3(4x+5y)
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<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>
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>