What is the property of this equation? if 2x=8 then x=4

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much