Question

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?

Answer 1

well you have 2 data points (80, 210) and (120, 290)

find the slope of the line... to start

then use

y = mx + b

substitute the slope.... then substitute either point to find b

then you'll have the equation of the line.

lastly, substitute x = 60 to find y.... or the cost

Answer 2

I got: y=2(60)+80=200

Answer 3

well I think the slope is right but the value of b is wrong

y = 2x + b

so substitute x = 80 and y = 210

so

210 = 2(80) + b

so b = 50

then the equation is

y = 2x + 50

now substitute x = 60...