50pts + brainliest pls find the equation of straight line passing through (1,-1) and (3,-5) pls help im in online class and i have to answer pls

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%