Make a scatterplot of the data and graph the function f(x)= -8x^{2} + 95x + 745.

sagnuhh 2021-01-08 Answered

Make a scatterplot of the data and graph the function f(x)= 8x2 + 95x + 745. Make a residual plot and describe how well the function fits the data. Price Increase01234Sales7308509309511010

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un4t5o4v
Answered 2021-01-09 Author has 105 answers

Step 1 By drawing the curve f(x)= 8x2 + 95x + 745 (expected) and marking the points in the graph (actual) we get it is given below. The residual value is calculated as Residual value=Actual valueExpected value
Residual value at x=0, R0=730  745
=15
Residual value at x=1, R1=850  832
=+18
Residual value at x=2, R2=930  903
=+27
Residual value at x=3, R3=951  958
=7
Residual value at x=4, R4=1010  997
=+13 image

Step 2 By plotting the residual value to the graph which is given below, we can see that the points are randomly scattered through the graph. This indicates that the line is a Good Fot. image

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