The estimated cost of a Hershey Bar is given by the formula, C =(5/4)t + 10, where C (cost in cents) is in terms of t (number ofyears since 1970). (Remember: 1970 means
t = 0.) Assume the cost can change once at the beginning of theyear.
(1) 1. Should the points of the graph of thisequation be connected? Yes or No
(circle one)
(1) 2. The year 2000 means t = ______.
(2) 3. Using t = 0 and the t-value from #2, find theircorresponding C -values.
Then choose two other years between 1970 and 2000, determinetheir
t-values and find their corresponding C âvalues.
(0, _____ ), (_____,______), (_____,______),(_____,______)
Interpret the last ordered pair in the context ofthe problem situation.
(2) 4. Based on these ordered pairs, adjust the viewingrectangle to graph the years
from 1970 to 2000. Describe the viewing rectangle you used, makingsure the
vertical intercept is also clearly visible.
tmin = _____ tmax = _____ Cmin = _____ Cmax =_____
(4) 5. Draw a complete graph using the viewingrectangle from #4.
(See graphing activity 1 or graphing instructionsheet on how to draw a complete graph.)
The estimated cost of a Hershey Bar is given by the formula, C =(5/4)t + 10, where C (cost in cents) is in terms of t (number ofyears since 1970). (Remember: 1970 means
t = 0.) Assume the cost can change once at the beginning of theyear.
(1) 1. Should the points of the graph of thisequation be connected? Yes or No
(circle one)
(1) 2. The year 2000 means t = ______.
(2) 3. Using t = 0 and the t-value from #2, find theircorresponding C -values.
Then choose two other years between 1970 and 2000, determinetheir
t-values and find their corresponding C âvalues.
(0, _____ ), (_____,______), (_____,______),(_____,______)
Interpret the last ordered pair in the context ofthe problem situation.
(2) 4. Based on these ordered pairs, adjust the viewingrectangle to graph the years
from 1970 to 2000. Describe the viewing rectangle you used, makingsure the
vertical intercept is also clearly visible.
tmin = _____ tmax = _____ Cmin = _____ Cmax =_____
(4) 5. Draw a complete graph using the viewingrectangle from #4.
(See graphing activity 1 or graphing instructionsheet on how to draw a complete graph.)
