Sandra makes a pizza. she puts mushrooms on 2/8 of the pizza

I;m not sure if this is what you're asking but 2/8 can be simplified.
Since both 2 and 8 are divisible by 2, 2/8 can be simplified to 1/4. So Sandra put mushrooms on 1/4 of the pizza

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for