In triangle ABC, angle A is 35 and angle b is 20 select all triangle which are similar to triangle ABC.

Answers:

Domain is all real numbers

When x goes up by 1, y multiplies by 2

The y intercept is (0,1)

The graph never goes below the x axis

Basically nearly every statement is true except for "the range is all real numbers". The range is actually y > 0 which fits with the graph not going below the x axis. Raising 2 to any real number leads to some positive result. If x = 0, then 2^x = 2^0 = 1 which is why the y intercept is 1.

The second statement can be shown by comparing 2^x with 2^(x+1). Dividing those values leads to [2^(x+1)]/[2^x] = 2^(x+1-x) = 2^1 = 2, meaning that increasing x by 1 has made y twice as large. An example of this would be going from (0,1) to (1,2) then to (2,4) and to (3,8) and so on.