Write an equation from a real-world situation
In y = mx + b, b is the starting amount and m is the change each period.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
A jar holds 23 coins and 2 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
Answer: y = 2x + 23
A pool holds 44 L of water and a hose adds 5 L every minute. Write an equation for the amount y after x time periods, in the form y = mx + b.
Answer: y = 5x + 44
A candle is 49 cm tall and burns down 9 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
Answer: y = -9x + 49
Tip: In y = mx + b, b is the starting amount and m is the change each period.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Ready for more Solve two-step equations Class 9
- Need a warm-up? One-step equations: add and subtract Class 7
Print a free worksheet with answers (20 questions).
Practise without limits
Members practise as much as they like, every day, and get the printable packs and lessons too.