Project Math Access DVD 03 - Graphing - Part 05
Transcript Start
Audio Description: Part five; Graph-It; example two; slope of a line.
TEACHER: Okay, we're going to try another equation. Let's get everything turned on again. Start with the Braille Lite. Then we want to turn on the Braille Blazer. It's a rocker switch, on-off, on the right side, in the back of the machine.
BRANDON: Yeah, didn't we explain that last time?
TEACHER: It never hurts to re-explain it.
BLAZER: (start-up sounds)
TEACHER: Okay. You want to get into your Graph-It program?
BRANDON: Yes.
TEACHER: Okay. You want an O chord first.
You want to go over the steps real quick? That was an O chord, and...
BRANDON: Yeah, sorry. I did that too quickly for you to hear it, but... Here we go. We did an O chord followed by an F, followed by a dots 4, 5, 6 chord, because that happens to be at the end of our particular file... list.
TEACHER: Okay, great. So you're in your program and you're looking for your first entry. So, you need an E chord. Okay, great. And the equation we are going to do is y=2x+5.
BRANDON: Now remember, all numbers must be entered in Nemeth Code.
TEACHER: Or, computer code. They're pretty similar but you want your equals sign in computer code
BRANDON: And that's dots 1, 2, 3,4, 5, 6.
TEACHER: Right.
TEACHER: And no spaces.
BRANDON: Right.
TEACHER: So we have that entered. Did you type an E chord?
BRANDON: We shall do that now.
TEACHER: Okay.
TEACHER: Alright, and to emboss?
BRANDON: P chord.
BLAZER: (buzzing sound)
Audio Description: The graph is about one-third completed, and consists of a straight line that begins in quadrant I, runs through quadrant II and end in quadrant III.
The graph is about two-thirds complete.
BRANDON: This one seems to be taking a little longer than the last one.
TEACHER: Okay, I'll go ahead and take the paper out. Okay, now, you remember the equation was y=2x+5. So what would your slope be?
BRANDON: The slope would be 2.
TEACHER: Right. And your Y intercept was?
BRANDON: Five.
TEACHER: Okay, so you want to check out
TEACHER: your graph and make sure it's right. Look for your Y intercept down there. So you go to the origin, and up 5,
BRANDON: Origin, origin, origin....
TEACHER: It's right here.
TEACHER: It's where the two axes meet.
BRANDON: Right here.
TEACHER: Right.
Audio Description: The teacher moves Brandon's hands to the origin.
TEACHER: Okay, you want to get enough sleep at night.
BRANDON: (laughs) No yawning.
TEACHER: Okay (laughing). From the origin you want to count up 5 since your Y intercept is positive 5. And there's some hash marks there...
TEACHER: Can you feel those?
BRANDON: Yes. 4, 5,...
TEACHER: Okay, is that where the line crosses?
BRANDON: Yeah.
TEACHER: So you're at your Y intercept, so if you were to go up 2 and over 1, which is your slope which is 2 over 1 so you're going up 2 and over 1.
TEACHER: Is it there?
BRANDON: Yeah.
TEACHER: Good. So you can feel your line. It starts out in the first quadrant up at the right, and goes down to the left and crosses the X axis and crosses... well it crosses the Y axis first and then the X axis. It's a diagonal line. Okay? Good job!