Challenge I need to know the steps

Question

Karen used a birthday check her mother gave her to start a savings account. She plans to save $25 per month as well. After 8 months, Karen had $250.

Define your variables and derive an equation to represent the situation.

Find the original check amount from Karen's mother.

Answer 1

Karen used a birthday check her mother gave her to start a savings account. She plans to save $25 per month as well. After 8 months, Karen had $250.

Define your variables and derive an equation to represent the situation.

Find the original check amount from Karen's mother.

Let y = mx +b

y = Total amount after x months

b= original Check amount from mother

after 8 months

y = 8*x + b

250 = 8* 25 + b

b = 250 -200 = 50

So equation is

y = mx + 50