Please help!! The variables x and y vary directly. When x=16, y=4. Write an equation that represents this relationship.

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?