Grow at and grow by

[mrmvp]

Hello.

When describing a trend or a chart. I'm struggling to figure out which I should use grow at, grow by, increase by , and increase at.

I hope teachers help me differentiate between them.

 

[Piscean]

Please give us a complete sentence to consider.

 

[teechar]

When describing a trend or a chart.

That is not a complete sentence.

When describing a trend or a chart, I'm struggling I struggle to figure out which I should use: grow at, grow by, increase by, , and or increase at.

Those are all possible. As Piscean said above, give us a sentence to work with.

 

[mrmvp]

I wrote three examples. I am puzzled when to use grow by or grow at.

1-The agricultural production grow at €3 million euros in 2007.
2-The agricultural production grow by €3 million euros in 2007 than the previous year.
3-The agricultural production increased from €3 million euros in 2007 to €5 million euros in 2008.

 

[emsr2d2]

I wrote three examples. I am puzzled when to use "grow by" or "grow at".

1- The Agricultural production grow grew at €3 million euros in 2007.
2- The Agricultural production grow grew by €3 million euros in 2007 than the previous year.
3- The The value of agricultural production increased from €3 million euros in 2007 to €5 million euros in 2008.

Sentences 1 and 2 are ungrammatical (even with the correct form of "grow").
Sentence 3 is possible with my amendments.

Something can "grow by" a number or a percentage etc.
Something can "grow at" a rate/speed of [number/percentage etc].