Determine if Set of Points is a Function which set of ordered pairs represents a function: {(3,6),(3,1),(9,0),(2,2)}, {(2,−5),(−3,6),(−1,−8),(−3,−4)}, {(4,−7),(−2,−1),(−7,4),(9,−1)},{(3, 8),(−2,−9),(1,4),(1,9)}

{(−2,−1),(−7,4),(9,−1)} Represents a function.

A function is a relation in which no two ordered pairs have the same input (or x-values) and different outputs (y-values).

Whenever you're trying to determine whether a given relation is a function, observe whether each first element (or input) correspond with EXACTLY ONE second element (or output).

Out of all the given options, the relation, {(−2,−1),(−7,4),(9,−1)} each x-coordinate corresponds exactly to one y-coordinate.

Therefore, the correct answer is {(−2,−1),(−7,4),(9,−1)} .

Answer: question no. 1 -a. yes, the sides are in the ratio 2 : 5.question no. 2 -b. 59°question no. 3 -c. angles x and y are remote interior angles.question no. 4 -d. 90°, 45° and 45°question no. 5 -b. mn and qrstep-by-step explanation: question no. 1 -rs : xu = 3 : 7.5 = 2 : 5rt : x? = 6.4 : 16 = 2 : 5st : u? = 6 : 15 = 2 : 5as the ratios of all sides are equivalent, the triangles must be congruent and the sides must be proportional.therefore, the answer is: a. yes, the sides are in the ratio 2 : 5.question no. 2 -in the second diagram, angle b is the only letter not shown. therefore, the number must be equivalent to angle b.if we substitute the value of angle b as being 22° in the first diagram, we can now use the angle sum of a triangle to obtain the value of angle a.angle sum of a triangle = 180°therefore: let angle a = aa + 99 + 22 = 180a = 180 - 99 - 22a = 59°therefore, the answer is: b. 59°question no. 3 -angles x and y don't share the vertex of the triangle with the exterior angle w. remote interior angles don't share a vertex of a triangle with an exterior angle. this means that angles x and y are remote interior angles.therefore, the answer is: c. angles x and y are remote interior angles.question no. 4 -the sum of all interior angles of a triangle must be equivalent to 180°.90°, 45° and 45° are the only set of angle measures that are equivalent to 180°.therefore, the answer is: d. 90°, 45° and 45°question no. 5 -the only pair of sides stated in the options which are corresponding are mn and qr.therefore, the answer is: b. mn and qr.