Question

Frankie and nick each graph the solution to the following inequality 8d ≥-40 Which student correctly graphed the solution

Answer 1

From the problem, we have the inequality :

$8d\ge-40$

Divide both sides by 8 :

$\begin{gathered} \frac{\cancel{8}d}{\cancel{8}}\ge\frac{-40}{8} \\ d\ge-5 \end{gathered}$

The solution is d is greater than or equal to 5.

Frankie and Nick's solution starts from x = -5 and the direction is to right.

Note that if the inequality symbols are < or >, the endpoint must be a non-shaded circle, otherwise it is a shaded circle

Since the inequality symbol is ≥, the endpoint must be a shaded circle.

ANSWER :

Frankie's solution is correct because the endpoint is a shaded circle.

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