Question

The table compares actual lengths in a room to lengths in a blueprint of the room. Blueprint length (in.) 4 8 12 16 20 24 Actual length (ft) 91827364554 Complete the equation for the relationship, where y is the actual length in feet, and is the blueprint length in Inches.y = ----------The length of a wall on the blueprint is 10 inches. Find the actual length of the wall. The actual wall is feet long ---------A window in the room has an actual width of 45 feet. Find the width of the window in the blueprint The width of the window in the blueprint is. ------- in.

Answer 1

Observe the given data carefully. The x-values increase at rate 4 while the y-values increase at rate 9. So it concludes that the increase is linear.

Also we know that only two points are sufficient two get the equation of a line.

Consider the first two points (4,9) and (8,19).

Apply the two point form of straight line,