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Hey, there I just need help with question 10) please!

Hey, there I just need help with question 10) please!-example-1
User Niel Ryan
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1 Answer

20 votes
20 votes

9)

Using the ordered pairs:


\begin{gathered} (x1,y1)=(0,1) \\ (x2,y2)=(1,-2) \end{gathered}

Since the values are increasing at a constant rate, we can model the function as a linear equation of the form:


\begin{gathered} y=mx+b \\ where\colon \\ m=(y2-y1)/(x2-x1)=(-2-1)/(1-0)=-(3)/(1) \\ m=-3 \end{gathered}

Using the point-slope equation:


\begin{gathered} y-y1=m(x-x1) \\ y-1=-3(x-0) \\ y-1=-3x-0 \\ y=-3x+1 \end{gathered}

User Mrehan
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