Question

Math question

Answer 1

They want you to multiply 3 by that matrix

Answer 2

Multiply the 3 by each term inside the matrix
\[\large \color{red}{3*}\left[\begin{array}{cccc}
-1 & 5 & 5 & -2\\
2 & 5 & 3 & -4
\end{array}\right]
=
\left[\begin{array}{cccc}
\color{red}{3*}(-1) & \color{red}{3*}5 & \color{red}{3*}5 & \color{red}{3*}(-2)\\
\color{red}{3*}2 & \color{red}{3*}5 & \color{red}{3*}3 & \color{red}{3*}(-4)
\end{array}\right]
=??\]
Note: the final result will be a 2x4 matrix

Answer 3

-3, 15, 15, -6
6, 15, 15, -12

Answer 4

very good

Answer 5

the first column -1, 2 turns into -3, 6

so it's the same as multiplying the point (-1,2) by 3 to get (-3,6). Dilating it out 3 times further away from the origin

Answer 6

Ok, so how can I tell which graph it is?

Answer 7

each column of the matrix represents a point or ordered pair

Answer 8

eg: first column -1,2 means we have the point (-1,2)

Answer 9

well I can't see your answer choices

Answer 10

A.

Answer 11

B.

Answer 12

C.

Answer 13

D.

Answer 14

@jim_thompson5910 It's A?

Answer 15

one moment

Answer 16

Probably the best thing you can do is just graph each point. What I did was graph using geogebra. That program has a lot of interactivity and flexibility, which is why I like it

So you'd graph each column as its own point

eg: W = (-1,2), X = (5,5), Y = (5,3), etc etc

see the attached as for what you'd get in the graph

Answer 17

Thanks so much!

Answer 18

no problem