Use the REGRESSION feature on a graphing calculator.A strain of E-coli Beu-recA441 is placed into a petri dish at 30?Celsius and allowed to grow. The following data are collected. Theory states that the number of bacteria in the petri dish will initially grow according to the law of uninhibited growth. The population is measured using an optical device in which the amount of light that passes through the petri dish is measured. 
Find the exponential equation in the form y = a ? bx, where x is the hours of growth. Round to four decimal places.
A. y = 1.3384 ? 0.0903x
B. y = 0.0903 ? 1.3384x
C. y = 0.0903x
D. y = 1.3384x
Answer: B
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Find the amount of each payment needed to accumulate the indicated amount in a sinking fund. Round to the nearest cent.
$6,400, money earns 8% compounded annually, 10 years
A. $384.51 B. $485.57 C. $512.51 D. $441.79
Refer to the following graphs to determine an appropriate response.Graph AGraph B 
? Graph CGraph D 
Which graphs of functions increase over the whole of their domain?
A. graphs C and D B. graph D C. graphs A and B D. graphs A and D
Solve.The ratio of the length to the width of a rectangular plot is 7 to 4. Its diagonal measures 
Find the dimensions of the plot.
A. Length: 56 ft; width: 32 ft B. Length: 45.5 ft; width: 26 ft C. Length: 52.5 ft; width: 30 ft D. Length: 49 ft; width: 28 ft
Determine algebraically whether the function is even, odd, or neither.f(x) = -6x2 - 3
A. even B. odd C. neither