Arelation is plotted as a linear function on the coordinate plane starting at point c (0,−1) and ending at point d (2,−11) . what is the rate of change for the linear function and what is its initial value?

The rate of change refers to the slope of the linear function, because the slope is actually a ration between the two variables. So, to find the slope, we use its definition:

Now we replace the given points, being C the first point and D the second point:

Therefore, the rate of change is -5, where the negative sign refers to a decreasing change, it's a decreasing linear function. In addition, the initial values is where the independent variable is zero, which is given in the point C (0;-1), so the initial condition is y = -1

yes. we do proportions in probabilities.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart