Question

The table shows the weight of 100 raspberries at a market.

Complete the table so that there is a proportional relationship between the number of raspberries and their weight.

Answer 1

Answer:

40 = 0.16 kg

100= 0.4 kg

300 = 1.20 kg

Step-by-step explanation:

so we take 100 = 0.4

so we know that 300 has to be 1.2

because 300 divided by 100 is 3 and 3 times 0.4 is 1.2

now for 40 it will be different

now since 0.4 kg of berries is 100 berries

so divide it and we find out for every 10 berries is 0.04 kg

so 40 berries are 0.16 kg

Answer 2

Answer:

Step-by-step explanation:

STEP 1: Find the unit rate. It's impossible to solve this problem without it.

Unit rate= y/x

y=0.4

x= 100

0.4/100= 0.004

Step 2: Form an equation with the unit rate so that it's easy to solve for the unknown variables by multiplying later.

things to remember:

______

*always have y on the left, followed by the equals sign

* y= unit rate times x.

*a number next to a letter always means multiplication. (examples: 5x,0.001x, 9y)

*x is the left column, y is the right column.

______

EQUATION:

y= 0.004x

Step 3: Solve for the unknowns

First, let's solve for y in the row where x=40.

y=0.004x

y= 0.004(40)

y= 0.16

Now, let's solve for the last row, where x=300.

y=0.004x

y=0.004(300)

y= 1.2

I've filled these numbers into the table, for reference.

Hope this helps!! :D

Also, here are some free practice problems on this topic:

https://www.ixl.com/math/grade-7/identify-proportional-relationships-from-tables