1. scott works as a delivery person for a shipping company. the graph shows a linear model for his delivery times on different days (b) based on the linear model, predict how long it initially took scott to deliver his packages (y-intercept). approximately how much did his delivery time decrease per day (slope)? the points on the graph are (3,21) and (6,12)

 Scott to deliver his packages = 30 times and -3 is his delivery time decrease per day.

Explanation: Since the line passes from the two points (3,21) and (6,12)-

as we know that the equation of a line passes through two points and is   ×

Thus equation of the line is ×(x-3)

= y-21=-3(x-3)

=y-21= -3 x+9

3 x +y=30, Which is the expression of Scott's delivery times on different days.

since according the graph- y-intercept= 30, which is the times in which Scott delivering his product initially.

Now, we have to find out Scott's delivery time decrease per day, for this slope of line 3x+y=30  is, m =

m= =-3

so required answer is,  slope=-3

its the fourth option

im not sure

step-by-step explanation: