Direction: Write your answers in pad paper and send thru knowledge bearer or via messenger

I. Determine the domain and range of the given relation and write whether the relation is a function or not.

1. {(4,2), (5,0), (-2,6), (0,1)}

2. {(7,2), (7,-2), (7,11), (10,-3}

3. {(w,s)|s^2=w)}

II. 15 Evaluate the following functions at x = 2. Write the letter of the correct answer on your answer sheet.

1. f(x) = 7x-1

a) 8 b) 9 c) 13 d) 15

2. g(x) = x2 - 4

a) 0 b) 4 c) 8d) 12

3. h(x) = 4x - 211 - 2

a)-15 b)-11 c) 11d) 15

III. Answer the following problems.

1. DJ, an entrepreneur, sells KN95 masks either per piece or bulk. He sells mask at $10 each for orders less than 50 pieces and $450 for a bulk of 50 pieces and $8 for each excess mask after that. Give the required piecewise function.

2. To attend her online class, Dorothy wanted to avail a cellphone plan that offers a monthly fee of $2,000. It includes 180 minutes of call and charges 8.00 for each additional minute of usage. a. Find the monthly cost function by completing this: C(x) =

b. How much will she pay if she only used an hour of call?

c. How many additional minutes of call did she make if she paid $2,480.00 in her monthly bill?

d. How much is her monthly cost incurred if she made an additional usage of 30 minutes of call?

3. Consider the functions f(x) = x2 - 4 and g(x) = x + 2. Explain how you will find (g x f).