Suppose that x varies directly with y and x=17 when y=-85. what is the constant variation and what is the value of x when y=-160

x=32

Step-by-step explanation:

The equation for direct variation is y =kx

We need to find the constant of variation k

-85 = k*17

Divide by 17

-85/17 = k

-5 = k

y = -5k

When y = -160

-160 = -5x

Divide by -5

-160/-5 =-5x/-5

32=x

all teachers

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.