# Algebra

13. Which relationship would most likely have a positive correlation?
a. The amount of memory in a computer, and the number of keys on the keyboard.
b. The rate at which a train travels, and the time it takes for it to reach its destination.
c. The number of tickets sold for a baseball game, and the number of hotdogs sold at the game.
B?

18. Solve 16(t - 1) + 10 > 8(t + 2) + 4(t - 1) + 4t.

33. Is y = 3x - 10 a linear equation?
a. No
b. Yes
c. Maybe
A?

34. Is y = 3x^2 - 10 a linear equation?
a. No
b. Yes
c. Sometimes
A?

35. If the money Tammy has in an investment doubles every 12 years, does her money grow linearly?
a. No
b. Yes
c. Sometimes
Not sure..

Thanks
-MC

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1. as speed goes up, time goes down, so no
hotdogs go up with number of patrons

16(t - 1) + 10 > 8(t + 2) + 4(t - 1) + 4t.

plug and chug
16 t -16 + 10 > 8 t + 16 + 4 t - 4 +4 t
there is 16 t on both sides so no solution for t
- 6 > 12
simply false

y = 3x - 10
form is y = m x + b
which is a linear equation in slope intercept form

y = 3x^2 - 10
No because there is a quadratic term, x^2

...doubles every 12 years, does her money grow linearly?
No, it grows exponentially
Say it doubled every year
That would be like compound interest at 100%
A = original * 2^n

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posted by Damon

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