Linear equation: a printer will produce 80 wedding invitations for $210. the price to produce 120 invitations is $290. the printer uses a linear function to determine the price for producing different amounts of invitations. how much will the printer charge to produce 60 invitations?

The printer will charge $170 to produce 60 invitations.

The solution is as follows:
Since we are using a linear function, we shall use the equation y= mx + b
(x1, y1) = (80, 210) and (x2, y2) = (120, 290)

Solving for m:

m= (y2- y1)/(x2-x1)
   = 80/40
   = 2

Moving forward:
y=2x +b, using x1 & y1 of (80, 210), the equation will be
210 = 2(80) + b
b= 210 -2(80)
b= 50

y= 2x + 50
Let x = 60, solving for y
y= 2(60) + 50
y= 120 + 50
y = 170