Question

Select all the points that lie on the graph of the line 4x + 8y = 40.

Answer 1

`4x+8y=40`

Let's check every point:

`\begin{gathered} (0,10) \\ 4(0)+8(10)=40 \\ 80=40 \\ False \end{gathered}`

This point is not on the line.

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`\begin{gathered} (0,20) \\ 4(0)+8(20)=40 \\ 160=40 \\ False \end{gathered}`

This point is not on the line.

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`\begin{gathered} (2,4) \\ 4(2)+8(4)=40 \\ 40=40 \\ True \end{gathered}`

This point is on the line

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`\begin{gathered} (2,8) \\ 4(2)+8(8)=40 \\ 72=40 \\ False \end{gathered}`

This point is not on the line

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`\begin{gathered} (10,0) \\ 4(10)+8(0)=40 \\ 40=40 \end{gathered}`

This point is on the line

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`\begin{gathered} (20,0) \\ 4(20)+8(0)=40 \\ 80=40 \\ False \end{gathered}`

This point is not on the line