Question

Write the direct variation of the equation if y varies directly with x and y = 45 when x = 9.

Answer 1

y=5x means 45=5*9.

Answer 2

y varies directly with x means

y = k x

you need to find k.

if you are given a y and x value, use their numbers in y = k x and solve for k
once you have a number for k, replace the letter "k" with that number
in y = k x

Answer 3

thanks