Question

2. Sara started out with $50 in her piggy bank. Every week she deposited the same amount of

money in the bank. After 7 weeks she had $67.50. Find the average rate of change or slope
in dollars per week. (This is a unit rate.)
3. At 4 a.m. the temperature was 38 degrees F. By 11 a.m. the temperature had risen to 60
degrees F. Find the average rate of change or slope in degrees per hour.

Answer 1

2. 50-67.50 =17.5
17.5/ 7 =2.5
3. 38-60 =22
4am to 11am is seven hours
22/7 =3