Many of the following problems can be modeled with a linear equation. Analyze them a...

Many of the following problems can be modeled with a linear equation. Analyze them and identify what quantities the variables x and y represent. The information provided in the problems is adequate to determine a point and a slope or two points on the line.

(See Example 12) Jane got a regular job and started adding $9 per week to her savings account. At the end of 11 weeks, she has $315 in savings. Write her savings as a linear function of the number of weeks since she started the job.