Question

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Answer 1

Let:

b = Number of plants that martha has in her backyard already

a = Number of plants she can grow with every seed packet she uses

x = Number of seed packets

y = Total number of plants

We can describe this situation with a linear model of the form:

$y(x)=ax+b$

so:

$\begin{gathered} a=2 \\ b=4 \\ y=2x+4 \end{gathered}$