Question 132151
y=kx
80=k*10
k=8


The equation of variation is y=8x.


See my explanation of this topic by clicking on my tutor name "rapaljer" anywhere in algebra.com.  Click on the first link on my homepage which is "Basic and Intermediate Algebra: One Step at a Time."  Go to Intermediate Algebra, Chapter 2, and look for Section 2.09  Ratio and Proportion and Variation.  Variation is the second half of this section.  See also MATH IN LIVING COLOR for this topic.


R^2