Ratios

Question 1

Useful Ratios cant’ have variables, they need to be defined fractions

Answer 1

Ex:
4 workers and m managers give you a ratio of 4/m workers to managers. Value will change pending m.

5m workers and m managers give you a ratio of 5/1 workers to managers. This is helpful because the ratio won’t change.

Question 2

Direct Proportions/Variations

Answer 2

If y varies directly (or is directly proportional) with x, y=kx

If y varies directly (or is directly proportional) with x^2, y=kx^2

Question 3

Indirect Proportions/Variations

Answer 3

If y varies indirectly with x, yx=k or y=k/x

Question 4

Combined Variation

Answer 4

If y varies directly with x and varies indirectly with z, then yz=kx