Alex had $234 in his bank account. For an entire month, Alex adds $2.10/day to the account. He graphs the money he saves versus time. He plots money saved along the vertical axis, and he plots time in days along the horizontal axis. What is the y-intercept of the line?

Question

anonymous · Answer

The equation for the problem is y=2.1x+234. What has to be true to have a y-intercept. Well when there is a y-intercept, there is ONLY a value in the co-ordinate. So what does that tell you about x?

anonymous · Answer

There is ONLY A Y VALUE IN CO-ORDINATE*

jdoe0001 · Answer

say   Alex goes on the 1st day and he deposits the 2.10 extra
how much does he have now?

anonymous · Answer

236.10 ?

anonymous · Answer

Dont guess, show us how you got that number so we can correct you.

anonymous · Answer

i added 2.10 to 234 ..

anonymous · Answer

okay no dont do that. A Y-intercept occurs, when the X value is zero. So now how would you get the Y-intercept of this equation. Y=2.1x+234

anonymous · Answer

Remember he already had $234 before he even started putting money in the bank account.

jdoe0001 · Answer

ahemm    right    2.10  + 234  = 236.10     that's on the 1st day

what about on the "zero" 0 day ?   how much did he have?

anonymous · Answer

234 ?