Gerri purchases a coupon book with discounts for her favorite coffee shop. Every coupon for the coffee shop offers the same discount. The table shows her total savings, y, based on the number of coupons, x, used from the book. A table showing Coffee Shop Coupon Savings with 2 columns and 6 rows. The first column, x, has the entries, 0, 5, 10, 15, 20. The second column, y, has the entries. negative 20, negative 10, 0, 10, 20.
What are the slope and y-intercept of the line represented by the points shown in the table?

slope: 2, y-intercept: –20
slope: 2, y-intercept: 10
slope: 5, y-intercept: –20
slope: 5, y-intercept: 10

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?