Five siblings have a combined age of 195 years . the oldest is 13 years older than the youngest marc . the middle child, anne, is five years younger than josie . the other two siblings are 6 years apart. if the second oldest child is 42 what are the ages of the siblings

a. positive: 2 or 0; negative : 2 or 0; complex: 4or2or0

the linear relationship that represents a variation in direct proportion is the linear function that varies according to the numbers of its domain, for example the cost of producing x number of items can be represented in direct proportion by f (x) = mx + b, where m is the constant of proportionality, x the number of articles produced and b the fixed cost