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44 votes
I did some of it can you help me finish the rest

I did some of it can you help me finish the rest-example-1
User Giovanni Lobitos
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2.7k points

1 Answer

27 votes
27 votes

From the image given, we can read the y-intercept, calculate the slope, and derive the equation of the line as follows:

- y-intercept = c = -2 (since the graph intercepts the y axis at -2)

- slope:


\text{slope}=m=(y_2-y_1)/(x_2-x_1)

consider the points: (x1, y1) = (0, -2) and (x2, y2) = (-3, -1)

Thus:


\begin{gathered} \text{slope}=m=(y_2-y_1)/(x_2-x_1)=\frac{-1_{}-(-2)}{(-3)_{}-0_{}}=(-1+2)/(-3-0)=(1)/(-3) \\ \Rightarrow\text{slope}=m=-(1)/(3) \end{gathered}

- Now, the equation of the line is:


y=mx+c

Thus:


y=-(1)/(3)x+(-2)
\Rightarrow y=-(1)/(3)x-2

User Sonicboom
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