Answer correctly / explain a little.

melt away weight loss uses the regression equation
y = 1.8x + 1.2 to predict the weight loss of their clients.
in the equation:
x = the number of weeks on a diet
and
y = the total number of pounds lost.
using the equation, how much weight did steve lose in 4 weeks?

a) 7.5 pounds

b) 8.4 pounds

c) 9.6 pounds

d) 10 pounds

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?

Ineed the solution to this problem and the steps.