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(-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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