Function PreCalc

Write the following in function notation.

A doctor measured a patient’s resting pulse rate at 80 beats per minute.

• f(x) = 80y

• f(y) = 80y

• f(x)=80x

Write the following in function notation.

Attorney A charges a fixed fee on $250 for an initial meeting and $150 per hour for all hours worked after that.

• f(x)=250x + 150

• f(x) = 150x + 250

• f(x) = 150x - 250

Plan A: $50 monthly membership fee and $10 per visit

What is the dependent variable

• monthly fee

• cost each visit

• total cost

Write in function notation.

Plan B: costs $25 monthly one time membership fee and $15 per visit

• f(x)=25x + 15

• f(x) = 15x + 25

• f(x) = 40x

Seth’s father is thinking of buying his son a six-month movie pass for $40. With the pass, matinees cost $1.50. How much would $12 movies cost?

• $41.50

• $53.50

• $58.00

What is the constant?

Julie wants to get ready for her beach vacation in one month. A tanning salon charges a 20 dollar monthly fee and 3 dollars for each visit.

• monthly fee

• number of visits

• total cost

Evaluate f(x) = x² for f(-8)

• 64
• -64
• -16
• 16

Evaluate f(t)=-2t²+ 1 for f(-3)

• 19
  
• 37
• -17
• -11