Henry could buy 4x+4 pencils for 2y dollars. How many pencils could he buy for $10? I tried to solve it with a graph. The x axis was pencils and the y axis was dollars. My slope/y-intercept equation was y=2x+2 which gave me 4 pencils for $10. Or I could have just substituted 10 for y in the original...
Okay, I figured it out with ratios and got the answer in the book, but if anyone can tell me why graphing didn't work I would appreciate it. Thanks in advance!
Until they give you some sort of relationship between x and y, I'm not seeing how you're supposed to proceed. :confused: I mean, sure, 2y = 10 so y = 5. But so what? Are you supposed to just guess that 2y must also equal 4x + 4...? I guess you are supposed to disregard the relationship, because the...