Practice Proportional Line in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A straight line that passes through the origin, representing a proportional relationship of the form y = kx with constant ratio k.
When x = 0, y = 0. The line passes through the origin—no head start.
Example 1
easyA recipe uses 3 cups of flour for every 2 cups of sugar. Write the relationship as y = kx and find k.
Example 2
mediumDoes the table represent a proportional relationship? x: 2, 4, 6; y: 5, 10, 15.
Example 3
easyIf y = 4x, find y when x = 7.
Example 4
mediumIs y = 3x + 2 a proportional relationship? Why or why not?