Four pounds of apple cost $5. Eight pounds of apples cost $10. Of the total cost of apples , y varies directly with the number of pounds of apples purchased, x, what is the cost of 6 pounds of apples? Round your answer to the nearest hundredth. ($0.80) ($1.25) ($4.80) ($7.50)

Step-by-step explanation:5

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

answer is:

1.75 pounds