Answer:
read below
Step-by-step explanation:
so a proportional relationship does not have y-intercepts (ex.: starting price...)
"a small pizza costs $9 and each additional topping costs $.75" is not proportional because it does not start at 0.
"a student earns $12 for each hour she tutors" for example, is proportional because it does start at 0 and does not have anything added to it.
proportional: y = mx
not proportional: y = mx + b
