she can count the number of row and the number of square in each row, or she can add 6 and 8
k = 1.33 or 1 1/3
Formula of Direct variation. Where y is equal to the product of the constant of variation times x.
y = kx
16 = k * 12
k = 16/12
k = 1 4/12 = 1 1/3
Constant of variation is 1 1/3 or 1.33.
This is easy go on khan academy an look up how to find the y coordinate
Rate of change is Rise over run=3/36=1/12 inches
