A manufacturing company finds that they can sell 25 items at $3.50 per item and 150 items at $3.00 per item. If
the relationship between the number of items sold z and the price per item p is a linear one:

Find a formula that gives a in terms of p: x= ____

Now use the formula to find the number of items they will sell if the price per item is $1.50.
They will sell ___ items if the price is $1.50.