Although the words “mentioned” and “declared” have similar meanings, they are different because
one is figurative
one is a euphemism
they have distinct denotations
they have distinct connotations

Although the words “mentioned” and “declared” have similar meanings, they are different because they have distinct denotations. Denotations give the literal meaning of the word. According to macmillan dictionary, “mentioned”  refer to something briefly without going into detail and “declared” means saying something in an empathic manner. 

this is the answer , p = 1 + (1/10)x

step-by-step explanation:

we have,

at sea level pressure is 1 atmosphere (i.e at x =0, p0=1 atmosphere)

at depth 23 meters , pressure = 3.3 atmosphere

since the pressure increases at constant rate as the depth increases, so we can write a relation as:

p =p0 +   kx   , where p is the pressure  , p0 is the initial pressure, x is the depth and k is constant rate of increasing.

to find constant rate k, plug p = 3.3 , p0 = 1 and x= 23 meters

we get,

  3.3 = 1 + k * 23

k = 2.3 / 23   = 1/10

so we can write the function formula as:   p = 1 + (1/10)x