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trasher [3.6K]
4 years ago
14

A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and t

he number of insect larvae (y) in the water:
graph of y equals minus 2 times the square of x plus 20 times x plus 400

What do the x-intercepts of the graph represent? (1 point)

a
There were 20 larvae at 0 degrees Celsius.

b
There were 10 larvae at 0 degrees Celsius.

c
The water has no larvae at −10 degrees Celsius and 20 degrees Celsius.

d
The water has maximum larvae at −10 degrees Celsius and 20 degrees Celsius.
Mathematics
2 answers:
Lera25 [3.4K]4 years ago
6 0

Answer:

Step-by-step explanation:

y crosses intercept when y-468  if x shows 2

it would be value of y-422 if x shows 1

it would be value of y- 478 if x shows 3

it would be value of y-550 if x shows 5

This is because If y = - 2x^2 + 20 *x + 400 if x = 2 during intercept of y.

X intercepts of the graph represents when x = zero usually but look at the line as it intercepts x and that is your answer for the second part.

For the first part you just minus whats shown except for 400 of that value there you can quadruple for ten from 5, quadruple six from 3 , or quadruple 8 from two or double 4 from 2. Then just add 400 to x as you took it away and then subtract that total from y.

mafiozo [28]4 years ago
6 0

Answer:c

The water has no larvae at −10 degrees Celsius and 20 degrees Celsius.

Step-by-step explanation:

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