Solve the problem.A space heater can raise the temperature in a room by 2°F every 5 minutes. The temperature in the room was 69°F after the heater had been running for 10 minutes. (i) Write as a linear equation in slope-intercept form the relationship between the time that the heater has been running and the temperature in the room.(ii) Explain how you could have predicted whether the slope of the graph of this equation is positive or negative.
A. (i) y = 
x - 65
(ii) As the amount of time the space heater is left on increases, the temperature of the room increases, which implies a positive slope.
B. (i) y = 
x + 65
(ii) As the amount of time the space heater is left on increases, the temperature of the room increases, which implies a positive slope.
C. (i) y = 
x + 65
(ii) As the amount of time the space heater is left on increases, the temperature of the room increases, which implies a positive slope.
D. (i) y = 
x - 65
(ii) As the amount of time the space heater is left on increases, the temperature of the room increases, which implies a positive slope.
Answer: B
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Provide an appropriate response.(a) Show that 
dx = 
e-4 < 0.0092 and hence that 
dx < 0.0092.(b) Explain why this means that 
dx can be replaced by 
dx without introducing an error of magnitude greater than 0.0092.
What will be an ideal response?
Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = 
x2 + 4x - 4
A. maximum at 
B. minimum at 
C. minimum at 
D. maximum at 
Match the point in polar coordinates with either A, B, C, or D on the graph.
A. A B. B C. C D. D
Raul has an adjusted income of $153,850, is married, and files jointly. Compute his tax. ? Revised 2003 Tax Rate SchedulesIf TAXABLE INCOMEThe TAX is Is OverBut Not OverThis AmountPlusThis %Of theExcess OverSCHEDULE Y-1 -Married Filing Jointlyor Qualifying Widow(er)$0$14,000$0.0010%$0.00$14,000$56,800$1,400.0015%$14,000$56,800$114,650$7,820.0025%$56,800$114,650$174,700$22,282.5028%$114,650$174,700$311,950$39,096.5033%$174,700$311,950-$84,389.0035%$311,950?
A. $32,082.50 B. $10,976.00 C. $33,258.50 D. $22,282.50 E. $22,377.50