If x and y are in direct proportion and y is 35 when x is 7, find y when x is 10.

Question

THE OTHER GUY WAS WRONG

Answer 1

y=kx

35 = k7, k=5

y=5x

y =5(10) = 50

y =50 when x =10

that's if x and y vary directly, in direct variation, with a constant k of variation

but

when you say "direct proportion" it seems like you mean the same thing, "direct" suggests

direct variation.

although "proportion" suggests a ratio, a fraction and inverse variation possibly

if so

then use y=k/x, 35=k/7, k =245

y = 245/x

y = 245/10 = 24.5 when x =10