Which linear equation shows a proportional relationship?

Question

y equals negative 2 times x minus one fifth
y equals two thirds times x minus 1
y equals 4 times x plus 6
y equals three fourths times x

Answer 1

A proportional relationship is represented by a linear equation in the form of y = kx, where k is a constant. Thus, the equation that shows a proportional relationship is:

y equals two thirds times x minus 1