x= no of engraved cards and y = no of all occassion.

So the equation will be 20x + 10y = 150 and to write that in the standard form you need to get y= so just manipulate the formula:

``

`` Then rearrange the equation to y=mx+c

y= -2x...

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x= no of engraved cards and y = no of all occassion.

So the equation will be 20x + 10y = 150 and to write that in the standard form you need to get y= so just manipulate the formula:

``

`` Then rearrange the equation to y=mx+c

y= -2x + 15

Remember that the slope is the gradient and is represented by 'm' in your equation. It shows how steep the incline is or the decline - this one has a negative slop indicated by the -2 in front of x.

Always remember to post multiple questions separately. The eNote rules prevent me from anserwing the 'solve for y' part of your equation so repost it separately .Thank you

Answer: **y= -2x + 15**