Long-life insurance has developed a linear model that it uses to determine the amount of term life insurance a family or four should have, based on the current age of the head of household. The equation is
y=150 -.1x
where
y=insurance needed ($000)
x=current age of head of household
a. plot the relationship on a graph
b. use the equation to determine the amount of term life insurance recommended for a family of four if the head of household is 30 years old.