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Just use the slope formula to get the slope, then use the point slope formula to find the equation
yes, that's a good start.
Well somewhere I'm getting hung up...so i end up with -3.5/15. Then go \[55.9=-3.5/15(90)+b? \]
if this is right, that's where I'm stuck. I now have to predict when it will be 48%? Plug 48 into y? Solve
Wait a sec...
Sorry, I thought you were using the point slope form. You decided to do this the other way... What do you get for b?
Well originally 76.9
So what is your y = mx + b formula now?
Should i plug the 48 in as y?
\[48=-3.5/15x+76.9\] Solve for x
yes,and what do you get for x?
I get year 2023 and 10.2/12 months
Hmm...so first I -76.9 from both sides?
so right around October of year 2023
End up with -28.9 = -3.5/15x
Do I convert m to -2.33?
wait a sec...
You should just solve it without converting.
So did you get 433.5/3.5?
So in years 1900 + 123.6 = 2023.6? That seems a lot close to what you had
Close enough. Good job
Wow...what a pain. OK, well thank you for the time. That is a lot closer to a realistic answer. Just need to make sure I follow each step carefully. Thanks again.