Question 1141407
<br>
P = a+bx<br>
b is the slope of the profit equation; it tells how fast the profit increases as the number of sales increases.<br>
Between the two given data points, sales increased by 300 (100 to 400) and profit increased by R 60000 (15000 to 75000).<br>
So the slope b is 60000/300 = 200.<br>
Now use that value of b and one of the two given data points to find the value of a.<br>
15000 = a+200(100)
15000 = a+20000
a = -5000<br>
The profit equation is P = -5000 + 300x.<br>