I need help with this pls

0.78

Step-by-step explanation:

The constant of proportionality is the "k" in y = kx.

y is the dependent variable (whatever you do to x changes y)

x is the independent variable (it doesn't change in relation to y)

Your pounds of apples is your x

Your cost is your y

From the first row: 0.78 = (k)(1), which simplifies to k = 0.78

If you want to test it out, pick another line:

y = kx

3.12 = (k)(4)

divide both sides by 4

k = 0.78

It's great when tables like this have something in the x column that is a 1...because then the y is also the k

the thermometer is precise but not accurate

step-by-step explanation:

here is your mark brainliest