A cruise ship is 5 kilometers away from its port and is traveling away from the port at 10 kilometers per hour. The function y=10x +5 relates the number of kilometers y the ship will be from its port x hours from now. How far will the cruise ship be from its port 4.5 hours from now

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true

I’m still confused on how to work the percentages

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.