Question Video: Solving Word Problems Involving Rate of Change Mathematics

Video Transcript

Daniel was 45 inches tall. After 15 months, he was 54 inches tall. Determine the monthly rate of change of his height.

Let’s first figure out how much he actually grew within those 15 months. So we take 54 minus 45 and get nine. So there were nine inches grown. And it was over a span of 15 months. So if we wanna know how much he is growing per month, we need to take 15 months and divide by nine inches. So we would get 1.7. So he would grow 1.7 inches per month.

Therefore, every month he grows 1.7 inches.