Answer: x ≥ 9
Step-by-step explanation:
Janie has an initial amount of $3, and she earns other $1.20 for each chore, so the equation is:
Money = $3 + x*$1.20
where x is the number of chores.
She wants to earn at least $13.50 to buy a CD, so the equation we need to solve is:
$3 + x*$1.20 ≥ $13.50
we need to solve it:
x*$1.20 ≥ $10.50
x ≥ 10.50/1.20 = 8.75
So x must be greater than 8.75, but we can not have a 0.75 of a chore, so we have that the minimum value of x can be 9.
x ≥ 9
The graph of this set of solutions is a point in the 9 in the number line, and all the numbers bigger than 9.
