Ireally need in this question i’m not really getting it at all. so much!

c=5/9(f−32)

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of 5/9 degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of 5/9 degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

D :)

Step-by-step explanation:

y

=

m

x

+

b

where in this case

C

=

5

9

(

F

−

32

)

or

C

=

5

9

F

−

5

9

(

32

)

You can see the slope of the graph is

5

9

, which means that for an increase of 1 degree Fahrenheit, the increase is

5

9

of 1 degree Celsius.

C

=

5

9

(

F

)

C

=

5

9

(

1

)

=

5

9

Therefore, statement I is true. This is the equivalent to saying that an increase of 1 degree Celsius is equal to an increase of

9

5

degrees Fahrenheit.

C

=

5

9

(

F

)

1

=

5

9

(

F

)

(

F

)

=

9

5

Since

9

5

= 1.8, statement II is true.

The only answer that has both statement I and statement II as true is D, but if you have time and want to be absolutely thorough, you can also check to see if statement III (an increase of

5

9

degree Fahrenheit is equal to a temperature increase of 1 degree Celsius) is true:

C=5/9(F)

C=5/9(5/9)

C=2581(which is ≠ 1)

An increase of 5/9 degree Fahrenheit leads to an increase of 2581, not 1 degree, Celsius, and so Statement III is not true.

The final answer is D. Hope I helped! :)

D is the answer

Step-by-step explanation:

:

step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50