Question

Candace is practicing her typing. She records the number of words she can type each minute and plans to plot the data on the following grid, where the x-axis represents the number of minutes and the y-axis represents the number of words typed. Which table shows data that could be best presented using a grid with the scales Candace chose? A. Minutes (x) 5 12 15 18 20 Words Typed (y) 140 336 420 504 560 B. Minutes (x) 140 336 420 504 560 Words Typed (y) 5 12 15 18 20 C. Minutes (x) 1 2 4 5 7 Words Typed (y) 30 60 120 150 210 D. Minutes (x) 15 18 20 24 28 Words Typed (y) 450 504 600 720 840

Answer 1

Explanation:

Hello!

Unfortunatelly you didn't upload the grid with the scales chosen by Candance.

Using the options you gave I've constructed four dotplots.

Y-axis: number of words per minute.

X-axis: number of minutes

To choose the set of X-Y I'll use the following guidelines:

-A graduate typist can type an average of 100-120 words per minute, then a students expected value will be less than 100 words per minute and a minimum of ≅30 words per minute (beginner).

Graph A

(x) 5 12 15 18 20

(y) 140 336 420 504 560

Considering the scale, and the words per minute for this scale are 140wods/5minutes= 28 words per minute. For a beginner this typing speed is acceptable.

Graph B

(x) 140 336 420 504 560

(y) 5 12 15 18 20

For this scale the words per minute are 5/140= 0.035 words per minute. This scale is wrong, someone actively typing wouldn't be so slow.

Graph C

(x) 1 2 4 5 7

(y) 30 60 120 150 210

The words per minute using this scale are 30 words per minute, for a beginner this is also an acceptable typing speed.

Graph D

(x) 15 18 20 24 28

(y) 450 504 600 720 840

For this scale the value of words per minute is 450/15= 30

The only graph off scale is B, the other three can be possible data sets for a typing student. I've attached the 4 graphics so you can compare them the grid.

I hope this helps!