Question

after swimming 60 feet below the surface of the water a whale swims up 30 feet. Use a number line to help you create an equation that shows the new location of the whale in relation to the waters surface.

Answer 1

typically we represent values below 0 with negative numbers

so if the whale is 60 feet below the surface, that's -60

start by making a number line, then marking -60

the whale swims 30 feet up ---> take your number line, then go in the positive direction 30 units

Answer 2

now, as for the equation:

the whale starts at -60, then add 30, write an equals sign, and then write the result after it. that'll be your equation.