Question

Which relationship between x and y in the equation shows a proportional relationship

A. y=3x

B. y=x-2

C. y=5x+3

D. y=5 (x+3)

Answer 1

The equation y = 3x shows a proportional relationship between x and y

Explanation:

• The proportional relationship is represented graphically by a line passes through the origin point

• The equation of the proportional relationship is y = m x

Let us solve the question

Substitute x by 0 to find the value of y, if y = 0, then the line represents this equation passes through the origin point, then the equation shows a proportional relationship

∵ y = 3x

∵ x = 0

∴ y = 3(0)

∴ y = 0

→ That means the line that represents the equation passes through

the origin point

∴ The equation y = 3x shows a proportional relationship between x and y