Which equation represents a proportional relationship between the x and y values? a) y = 2 b) y = 1 4 x + 1 c) y = x − 4 d) y = −2x

y = -2x

Step-by-step explanation:

Variation has to do with determining the relationship between two or more variables.

We have different types of variables which includes the direct, inverse, partial and joint variation.

In direct variation, increase or decrease in a variable leads to increase or decrease in the other variable. For example, given two variables x and y.

If y is directly proportional to x, it is written as y = kx where k is a constant of proportionality.

In the question above, the only function that represents a proportional relationship is y = -2x where -2 serves as the proportionality constant.

The function is a direct variation.

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

step-by-step explanation:

given expression is .

now we need to simplify the given expression .

we know that square root is equivalent to the power 1/2. so that means we can take half of the exponents to get the square root of given expression.

expanding that will give a very very large number so let's keep answer in exponent form.