For every 3 lemons Chrissy buys at a a farm stand, the tots cost increases by $1.80. -The constant of proportionality is _
-An equation that relates the total cost, y, and the number of lemons, x, is y =___x
-Use the equation you wrote to complete the table (The table is in the image here)

The constant of proportionality is $1.80

y = 1.80x

Step-by-step explanation:

The constant of proportionality is $1.80

An equation that relates the total cost, y, and the number of lemons, x, is

y = 1.80x

where,

y =Total cost

x = number of lemon

When x = 4

y = 1.80x

= 1.80(4)

= 7.2

y = $7.2

When y = $4.20

y = 1.80x

4.20 = 1.80x

x = 4.20 / 1.80

= 2 1/3

x = 2 1/3

When y = $9.00

y = 1.80x

9.00 = 1.80x

x = 9.00 / 1.80

= 5

x = 5

When x = 18

y = 1.80x

= 1.80 × 18

= 32.4

y = $32.4

4th option is correct xy=-10

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6mm^3 or .6cm^3

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6     6   6

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