The table shows the time a patient spends at the dentist and the amount of the bill. A 2-column table with 4 rows. The first column is labeled time spent at the dentist (in hours) with entries 1.4, 2.7, 0.75, 1.6. The second column is labeled bill amount (in dollars) with entries 235, 867, 156, 215.
What is the correlation coefficient for the data in the table?

–0.93
–0.27
0.27
0.93

m a t h w a y. c o m

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

probably the last option

step-by-step explanation: