Question 1185276
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The number of pounds of coffee sold depends on the price, so the price is the independent variable (x) and the number of pounds sold is the dependent variable (y).<br>
A. (4,650) and (8,400)<br>
B. The slope is the change in pounds sold, divided by change in price, between the two data points.  You can do the calculations.  Note that (logically) the number of pounds sold decreases as the price increases, so your answer for the slope should be negative.<br>
C. See the discussion above for B<br>
D. Point-slope form: y-y(1)=m(x-x(1))
x(1) and (y(1) you can get from A; the slope m you found in B<br>
E. Plug x=6 into your equation from D.  Note that $6 is halfway between $4 and $8; with a linear function the number of pounds sold should be halfway between 650 and 400, which is 525.<br>