Y=-5(8,3) write in slope intercept form

Ihonestly don’t understand this at all

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

The function show two sisters' savings account and the rate at which they plan to deposit money