Use a graphing calculator to plot the data and find the quadratic function of best fit.An engineer collects data showing the speed s of a given car model and its average miles per gallon M. Use a graphing calculator to plot the scatter diagram. What is the quadratic function of best fit? Round values to the nearest thousandth.
A. M(s) = -6.309x2 + 0.720x + 5.142
B. M(s) = -0.631x2 + 0.720x + 5.142
C. M(s) = 0.063x2 + 0.720x + 5.142
D. M(s) = -0.006x2 + 0.720x + 5.142
Answer: D
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A. Inconsistent and independent B. Consistent and independent C. Consistent and dependent D. Inconsistent and dependent
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A. $92,400 B. $-30,600 C. $-32,000 D. $215,400
Right triangle ABC has 
, 
, and 
style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_14455ebf5b3b4469b28aa8009" />. Use this information to find cos A.
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A. 
B. ?
C. ?
D. ?
E. ?