Which of the following relationships represents a function? a. (-4,4), (6,2), (-2,1), (9,2) b. (-4,4), (6,6), (-4,3), (9,2) c. (-4,4), (6,6), (6,3), (8,2) d. (-4,0), (6,3), (-2,1), (6,5)

A. is the answer

Step-by-step explanation:

A. Since there is one value of  y  for every value of  x

B. is not a function x  =  − 4  produces  y  =  4  and  y  =  3

C. is not a function x  =  6  produces  y  =  6  and  y  =  3

D. is not a function   x  =  6  produces  y  =  3  and  y  =  5

Hope That Helps!

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.

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)