N D
Which relation is a function?
A. (3, -2), (4, 6), (-2, 6), (3, 1)
B. (-1, 4), (3, 2), (4, -2), (2, 4)
C. (2, -7), (-8, 2), (2, 4), (-1, 5)
D. (2, 2), (-3, -4), (-3, 1), (-2, 1)

B (-1,4), (3,2), (4,-2), (2,4)

Step-by-step explanation:

When this function is graphed, it passes the vertical line test. Another indicator that this is a function, is that not one x-coordinate is the same. So basically, the x-coordinates must always be different in order for a set of ordered pairs to be considered a function.

linearly: 8560 bacteria

exponentially: approximately 75233 bacteria

step-by-step explanation:

assuming it is not exponential (we would have some really complicated logarithms), let's say it is linear. then, after 5 hours, it increased by 1200 bacteria, so every hour it increases by 240 bacteria. this means that after 19 hours, we get 19 * 240 + 4000 bacteria or 3800 + 760 + 4000 = 7800 + 760 = 8560 bacteria.

because it says round your answer, i will do this exponentially (with a calculator, of course). first, we need to find how much it multiplies by every hour, by taking the 5th root of 52/40 or 13/10. this is approximately 0.167. we still need to add 1 to this, because we are multiplying by that number, not adding that amount of the number. now, we just calculate 4000 * (1.167)^19. use a calculator to get approximately 75232.6, or 75233.

she will most likely have 33  

step-by-step explanation: