The answer would be:
y = 5
x = 4
Answer:
pre-image XYZ is X (2, 2), Y (6, 0), Z (1, -1)
The above is the second option in your question.
Step-by-step explanation:
a triangle has points X' (-2, 2), Y' (0, 6), Z' (1, 1)
To rotate the above triangle -90° about the origin you invert the x & y values and change the sign on the new y value.
pre-image XYZ is X (2, 2), Y (6, 0), Z (1, -1)
The first one 7/2 represents the change in y over change in x.
For those kinds of questions I would refer to the change in y over change in x method.
Bullet 3 would work because 7/2 doesn’t result to 1. So that’s not the answer.
I hope that helps
Answer:
The constant of proportionality is option D i.e 5.
Step-by-step explanation:
Variation:
Variation problems involve fairly simple relationships or formulas, involving one variable being equal to one term. There are two types of variation i.e.
- Direct variation
- Inverse variation
Direct Variation:
Mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other.
Example 
where, k is constant of proportionality.
The above given example is of Direct Variation
∴ y = 5 x
∴ k = 5 = constant of proportionality.
Inverse Variation:
Mathematical relationship between two variables which can be expressed by an equation in which the product of two variables is equal to a constant.
Example 
where, k is constant of proportionality.