Answer:
16 minutes
Step-by-step explanation:
Given
Represent minutes with M and Phone calls with P.
When M = 8; P = 2
Required
Determine M when P = 4
First, we need to determine the constant of proportion using:
[tex]M = k * P[/tex]
Where k represents the constant:
[tex]8 = k * 2[/tex]
Divide through by 2
[tex]4 = k[/tex]
[tex]k = 4[/tex]
Solving for M, when P = 4
Substitute 4 for P and 4 for k in [tex]M = k * P[/tex]
[tex]M = 4 * 4[/tex]
[tex]M = 16[/tex]
Hence:
She spent 16 minutes in total