12 things that has energy

Kinetic Energy Potential Energy Chemical Energy Elastic Energy Gravitational Energy Magnetic Energy Nuclear Energy  Light Energy Radiant Energy Sound Energy Thermal Energy  Mechanical Energy Electrical Energy

Step-by-step explanation:

to complete this square you have to rotate about the origin 270 degrees clockwise.

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x