Which is not an equation of the line going through (6,7) and (2,-1)

y+1=1/2(x-2) is not an equation going through (6,7) and (2,-1).

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.