The graph shows the relationship between the hours rachel studied and the exam grades she earned Plz answer

11. This is a function because every input, the number of hours studied,  has one output, the grade.

12. Looking at the graph it already has a point for 2 hours. Plotting another 2 hour point would no longer make it a function. This is because there are now two outputs for one input.

Step-by-step explanation:

A function is a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.