Question

7) Suppose y varies directly as x and y = 98 when x = 14,find y when x = -4.8)th

Answer 1

Direct variation of y , with x

then

y = k•x

or also

k = y/x

k= 98/14 = 7

Then equation is

y= 7x

NOW replace x= -4 in last equation

y = 7•(-4) = -28