Lemon juice has a pH level of 2, but milk has a pH level of 6. How does the concentration of hydrogen ions in lemon juice compare to the concentration of
hydrogen ions in milk?

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.