This is what I got:
60/50 = X/70
70x60/59 = X
X = 84
The equation of a line starting from two points is:

From the first point you get: x1 = -1, y1 = -2
From the second point you get: x2 = 3, y2 = 10
Replace x1, y1, x2, y2 in the equation of the line and you get:



From this you get the equation of your line:
1095 to the second power is what google told me!
Answer:
He would need to know how many yards he wants to buy
Step-by-step explanation: