Thursday, August 28, 2014

Algebra 2 Solutions Manual vs. Homeschool Mom

This is problem 5 from Foerster's Algebra 2/Trig Solutions Manual, exercise 3-2: 
This website graphs the equation [y=2x-5] the way I would imagine it ought to be done, so the solution above looks wrong to me. But TWO mistakes in the same section seems unlikely, so I'm second-guessing myself. A. LOT. *blush*

Because here's problem 3:
And I'm not sure if this will work, but I put this equation [y=(-3/2)x-4] into Google & got this graph. So again, that's what I got. And it doesn't match the SM. Which is doing nothing to reassure me that, yes, *I* Can Teach Algebra 2. And maybe even Trig. *puddle* :(


  1. [sigh] Incorrect answers in solutions manuals are so frustrating! I agree with you: They both look wrong.

    y=2x-5 if x=0 => y=2*0-5 => y=-5

    y=(-3/2)x-4 if x=2 => y=(-3/2)2-4 => y=-6/2-4 => y=-3-4 => y=-7

    I wish more solutions included at least a little bit of the work showing how they arrived at their answer.

    You can teach this. Looks like you're doing great!


    1. Thank you so much for taking the time to reply! And your encouraging words are GOLD to this mom. Thanks again! :)