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4) Select all ordered pairs that satisfy thefunction: y=-3x + 4A.(-2,10)B. (-1,1)C. (5,-11)D. (6,-22)

User Ramon Snir
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1 Answer

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To know if an ordered pair satisfy an equation we have to substitute the values in it and see if the left side is equatl to the right side.

Pair (-2,10)

In this case x=-2 and y=10. Plugging the values in the equation:


\begin{gathered} 10=-3(-2)+4 \\ 10=6+4 \\ 10=10 \end{gathered}

since both sides have the same value, this paired satisfy the equation.

Pair (-1,1)

In this case x=-1 and y=1. Then


\begin{gathered} 1=-3(-1)+4 \\ 1=3+4 \\ 1=7 \end{gathered}

since this is not true, this ordered pair don't satisfy the equation.

Pair (5,-11)

In this case x=5 and y=-11. Then


\begin{gathered} -11=-3(5)+4 \\ -11=-15+4 \\ -11=-11 \end{gathered}

since this is true the ordered pair satisfy the equation.

Pair (6,-22)

In this case x=6 and y=-22. Then


\begin{gathered} -22=-3(6)+4 \\ -22=-18+4 \\ -22=-14 \end{gathered}

since this is not true, this ordered pair don't satisfy the equation.

Therefore the ordered pairs that satisfy the equation are the points A and C.

User Tej Shah
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