Lesson 2.1.2: Constant Rate of Change (Day 38)

WORDS PER MINUTE

First Verse:

Thirty words per minute,

That's how fast Clara can type.

How many words in eighty?

How long will she type 75?

Pre-Chorus:

Let x be minutes in equation,

Let y be typed words in equation.

Then you must write down the equation,

Then you must now solve the equation.

Chorus:

WPM (4 times)

Second Verse:

Thirty words per minute,

That's how fast Clara can type.

She has written 75,

Tobias's rate is 45.

(to Pre-Chorus)

This is the seventh song that I'm writing in 10EDL, our main scale for September and October. The next few 10EDL songs will be written in ABC format, with verses, a pre-chorus, and a chorus.

As you can see, I've decided to start Chapter 2 this week after all. This chapter is on linear functions, including slope. But we will still take the Chapter 1 Test, created and posted by one of the other Math I teachers, at the end of this week. (Clara and Tobias are two names mentioned in today's Desmos lesson, which was on words per minute as an introduction to rates.)

Here's a link to the Mocha code for the song:

https://www.haplessgenius.com/mocha/

10 N=8

20 FOR V=1 TO 68

30 FOR X=1 TO 2

40 READ A,T

50 SOUND 261-N*A,T

60 NEXT V

70 RESTORE

80 NEXT X

90 END

100 DATA 6,4,5,4,5,4,6,4,7,8,10,8

110 DATA 6,4,5,4,5,4,6,4,7,8,10,8

120 DATA 6,4,5,4,5,4,6,4,7,8,10,8

130 DATA 6,4,5,4,5,4,6,4,7,8,10,8

140 DATA 8,4,9,4,5,2,9,2,5,2,6,2,10,6,6,6,6,4

150 DATA 8,4,9,4,5,2,9,2,5,2,6,2,10,6,6,6,6,4

160 DATA 8,4,9,4,5,2,9,2,5,2,6,2,10,6,6,6,6,4

170 DATA 8,4,9,4,5,2,9,2,5,2,6,2,10,6,6,6,6,4

180 DATA 8,16,7,16

190 DATA 8,16,7,16

200 DATA 8,16,7,16

210 DATA 8,16,7,16

Don't forget to click Sound before you RUN the program.

Since we moved up a level from having just verses and chorus to adding a pre-chorus as well, this time I fell back to having a simple chorus with just two whole notes (E-F#). I sing the initials WPM during this part -- W during the long E note and PM during the F#. Again, a simple chorus makes it easier to type in the Mocha code (so we worry less about whether we have enough WPM speed to type it fast).

The chord riffs for this song are Am-D7 for the verses, E7-Am for the pre-chorus and C-D(7) during the chorus section. I avoid the tonic chord C during the pre-chorus -- this section is supposed to lead into the chorus, and E7-Am sounds better here than a C chord.