y = x/k so 15 = 6/k making k = 0.4. when x = 10 y = 10/0.4 ie 25
alternatively y/x = k ie 15/6 = k so k = 2.5; y/10 = 2.5 making y = 25.
40
y = -5
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
y = 8
Since r varies directly with s, we have r = ks (replace k with 5 and s with 7) r = (5)(7) r = 35
57
40
y = -5
4x= y
y = 10x
Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40
What is y? Fx varies with x, but y could be anything.
y = 8
Since r varies directly with s, we have r = ks (replace k with 5 and s with 7) r = (5)(7) r = 35
m = 24
x = 24
y = 3x y = 3*19 = 57