Part 1: Use an encoding matrix. Raya set up a short scavenger hunt using matrices to encode the location of a wooden token. The scavenger hunt might involve several locales on the school campus, such as the auditorium, cafeteria, gymnasium, library, and the quad (common area where students gather). To receive the first clue, Darnell has to first encode a message to Raya.
To encode the message, Darnell was given a 2 x 2 encoding matrix, A.

Each letter of the alphabet is assigned a numerical value, and the value ‘0’ represents a space and is indicated in the code by an underscore ( _ ).
0 _ 9 I 18 R
1 A 10 J 19 S
2 B 11 K 20 T
3 C 12 L 21 U
4 D 13 M 22 V
5 E 14 N 23 W
6 F 15 O 24 X
7 G 16 P 25 Y
8 H 17 Q 26 Z

The method in which the messages are encoded is as follows.
“Test one” coordinates to the number string: 20 5 19 20 0 15 14 5

T E S T _ O N E
20 5 19 20 0 15 14 5

The encoding matrix is 2 x 2, so the enumerated message above is broken up into a sequence of 2 x 1 matrices, then combined to create matrix M.

The encoded matrix is the result of matrix multiplication between the coded matrix, A, and the enumerated message, M.

Recall that in order to start the scavenger hunt, Darnell needs to send an encoded message to Raya.
a) Based on the table, what is the number string that corresponds to the text “Hello Raya”? (1 point)

b) How many 2 x 1 matrices will be in the sequence? How do you know that? (2 points)

c) Write the sequence of 2 x 1 matrices that Darnell will use to encode. (1 point)

d) What is the enumerated matrix B? (2 points)

e) What is A × B? (Show your work) (4 points)

step-by-step explanation:

dong do iy iys a scram

i cant see the graph

step-by-step explanation:

when functions are first introduced, you will probably have some simplistic "functions" and relations to deal with, usually being just sets of points. these won't be terribly useful or interesting functions and relations, but your text wants you to get the idea of what the domain and range of a function are. small sets of points are generally the simplest sorts of relations, so your book starts with those.

step-by-step explanation:

state the domain and range of the following relation. is the relation a function?

{(2, –3), (4, 6), (3, –1), (6, 6), (2, 3)}

the above list of points, being a relationship between certain x's and certain y's, is a relation. the domain is all the x-values, and the range is all the y-values. to give the domain and the range, i just list the values without duplication:

domain: {2, 3, 4, 6}

range: {–3, –1, 3, 6}

(it is customary to list these values in numerical order, but it is not required. sets are called "unordered lists", so you can list the numbers in any order you feel like. just don't duplicate: technically, repetitions are okay in sets, but most instructors would count off for this.)

while the given set does indeed represent a relation (because x's and y's are being related to each other), the set they gave me contains two points with the same x-value: (2, –3) and (2, 3). since x = 2 gives me two possible destinations (that is, two possible y-values), then this relation is not a function.

note that all i had to do to check whether the relation was a function was to look for duplicate x-values. if you find any duplicate x-values, then the different y-values mean that you do not have a function. remember: for a relation to be a function, each x-value has to go to one, and only one, y-value.

state the domain and range of the following relation. is the relation a function?

{(–3, 5), (–2, 5), (–1, 5), (0, 5), (1, 5), (2, 5)}

i'll just list the x-values for the domain and the y-values for the range: