The singular noun, quality, forms the plural by dropping the -y and adding -ies. The plural form is qualities.
the change in y over the change in x equals the slope(m) in the equation y=mx+b
=2-x+y
Add x and y then Divide by the postulate, subtract 7, add 13, then divide by 3.
change in y/ change in xORrise/run
y' = y, x' = -x.
b-en
Some words end in a consonant + y. To make them plural, change y to i and add es. Candy -> Candies
If the y is immediately preceded by a consonant, change y to ies. If the y is preceded by a vowel, simply add s after the y, as with most other words.
Change the y to an i and add -est. happy, happiest
You have to change the y to an I and add the es
You drop the y and add ies to get libraries. You can also say - change the y to an i and add es.
Mortifies doesn't have a Y because when a word that ends in a Y becomes plural you change the Y to an I and add ES.
Change the Y to I and add -es : the plural is poppies.
This is because of the letters that precede 'Y'. When the 'Y' follows a consonant, the 'Y' must be replaced with 'I' and "ES" is added. When the 'Y' follows a vowel, only an 'S' is needed.
pony tally vanity, grocery, humanity pinny penny ponies tallies vanities groceries humanities pinnies pennies
Verily I say unto you, you must change the "y" to "i" first.
Change the y to an i and add -es.