the value of y is directly proportional to the value of x. If y=35 when x=140, what is the value of y when x=70 ?
Accepted Solution
A:
There’s two ways to complete this problem. First way: Let’s see if y can be multiplied by anything to get to x. We should divide y by x. 35/140 .25 So it looks like y will be 1/4 of x. Since we know that, we can find the value of y using this equation. .25x=y .25•70 17.5 So the value of y when x=70 is 17.5 Second way: As you can tell, they want us to find the value of y when x is half of what it was before. 140:35 70:y All we have to do is divide 35 by 2 since that’s what we did to the other side. 35/2=17.5 When x is 70, y is 17.5.