High School

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Emilio practices the piano for 20 minutes a day. To identify the total number of minutes he practices, he uses the function rule: \( y = 20x \).

Find \( f(8) \).

A. 28
B. 40
C. 80
D. 160

Answer :

Answer:

D. 160

Step-by-step explanation:

This question asks us to find f(8). Essentially, this asks us to find out what y is when x is equal to 8. In terms of this problem, how many minutes does he practice after 8 days.

We are given the equation:

y=20x

We want to find f(8). Therefore, we must substitute 8 in for x.

y=20(8)

Multiply 20 and 8

y=160

Therefore, f(8) is 160 and D is the correct answer. This means that after 8 days, Emilio practices for 160 minutes.

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Rewritten by : Barada

Answer:

160

Step-by-step explanation: