tag:blogger.com,1999:blog-7691251033406320222.post533162771992241855..comments2024-03-26T04:19:38.862-07:00Comments on kitchen table math, the sequel: true confessionCatherine Johnsonhttp://www.blogger.com/profile/03347093496361370174noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7691251033406320222.post-61468134723952189842007-12-31T14:04:00.000-08:002007-12-31T14:04:00.000-08:00Hi David!Yes, I think I probably just forgot what ...Hi David!<BR/><BR/>Yes, I think I probably just forgot what the problem asked for and found the y-intercept on autopilot.<BR/><BR/>I do wonder, though, whether I would have seen the more direct solution if I'd read the problem more closely.<BR/><BR/>I tend to think not.<BR/><BR/>ALTHOUGH, to be perfectly accurate, I remember doing these homework sets in a state of exhaustion and frayed nerves (book deadline)....so I think I do better when I'm more focused on math.<BR/><BR/>Even so, wild goose chases happen to me pretty regularly.Catherine Johnsonhttps://www.blogger.com/profile/03347093496361370174noreply@blogger.comtag:blogger.com,1999:blog-7691251033406320222.post-56880818768456632622007-12-30T10:58:00.000-08:002007-12-30T10:58:00.000-08:00Although it's not the most direct solution, this i...Although it's not the most direct solution, this is a very good start. You have found that the equation of the line is y = (4/3)x + 29/3. Substituting (r,3) into the equation of the line yields 3 = (4/3)r + 29/3, which you can solve for r.Davidhttps://www.blogger.com/profile/09232747857608296294noreply@blogger.comtag:blogger.com,1999:blog-7691251033406320222.post-72781792597486735892007-12-30T05:59:00.000-08:002007-12-30T05:59:00.000-08:00I love stuff like this because our kids are CONSTA...I love stuff like this because our kids are CONSTANTLY being hammered for irresponsibility, etc....and here I am, teaching myself math, highly motivated, and I'm failing to read the problem and follow directions.<BR/><BR/>Of course, this is why I'm committing 2008 to Behavior Management.<BR/><BR/>(Still want to do that book club - haven't figured out how....)Catherine Johnsonhttps://www.blogger.com/profile/03347093496361370174noreply@blogger.comtag:blogger.com,1999:blog-7691251033406320222.post-1363335546990169312007-12-30T05:06:00.000-08:002007-12-30T05:06:00.000-08:00Alternatively, you can arrive at C's answer by plo...Alternatively, you can arrive at C's answer by plotting the known point on graph paper, draw a line through (-2,7) with a slope of 4/3 and look where it intersects a horizontal line at y=3. The intersection point is your missing x coordinate.LynnGhttps://www.blogger.com/profile/11467061079495021347noreply@blogger.comtag:blogger.com,1999:blog-7691251033406320222.post-12403446114250222592007-12-30T04:55:00.000-08:002007-12-30T04:55:00.000-08:00It has been a long time since I did geometry (othe...It has been a long time since I did geometry (other than watch my son survive it); but it looks like you correctly solved for the y-intercept.<BR/><BR/>Unfortunately, you weren't trying to find the y-intercept, so it was the wrong procedure, otherwise the math is good (for finding the intercept).<BR/><BR/>This is a great example of the Wild Mathematical Goose. You had a procedure that looked to be somewhat relevant, i.e., it involved slope and x,y coordinates, but answered the wrong question. <BR/><BR/>Apparently, you need more spaced repetition.LynnGhttps://www.blogger.com/profile/11467061079495021347noreply@blogger.com