Based on the trend lines you just generated, which of these statements are true? Check all that apply. Both scatterplots had trend lines with positive slopes. The same test score is expected from studying for 5 hours or sleeping for 5 hours. There is no correlation between the test scores and the number of hours slept. The regression line can predict the number of hours studied based on the number of hours slept. There is evidence that those with higher test scores tended to sleep more the night before.

1 and 5 just did it

Step-by-step explanation:

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.

since both sides equal, there are infinitely many olutions.