Aleksandar buys some matenitsi, bracelets that are worn by Bulgarians in March to welcome spring , at a craft fair. Then he decides to make his own. He makes the graph below to represent the number of bracelets he had after each day he works to make the bracelets. y=?x+?
The slope represents the number of ?
They y intercept represents the number of ?

Help me I have a confrence this thrusday and Im failing my math class and I want to get my grade up, if you have the answer please type it because if you put a link it wont let me open it.

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?