1. The problem statement, all variables and given/known data I need to create a function to represent height as a function of time in a given word problem when given the radius, constant speed and initial height. The back wheel of a bicycle is 25 cm in radius. The constant speed of the cyclist is 12 m/s. I need to calculate the height of the hind wheel from the ground at given points in seconds. The initial height is 0 (ground level). This question is really confusing me because I know what my answer is suppose to look like, but I can't achieve it. Never worked with circles before, it's usually when an item is thrown up in the air or a person jumps off a bridge into water. 2. Relevant equations 3. The attempt at a solution Ok so I have a data table that looks like this. t h 0 0 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? Ok I know that because its a wheel that at certain time intervals my equation needs to amount the same value. Like if we start at 0, the height is 0. At one second the height is 8 cm, at 2 seconds the height is 16, at 3 seconds the height is 25. Once it's reached the maximum height our time intervals after 3 should start repeating. at 4 seconds the height is 16cm, at 5 seconds the height is 8 cm and at 6 seconds the height is at ground level again or 0. Every equation I come up with doesn't satisfy my desired results. I have a feeling it has something to do with radius and circles because I've had a fair amount of practice at this, but never a problem like this one. Any help is very appreciated, just need a push in the right direction. This is a Grade 12 Advanced Functions course if anyone is interested.