Question

Find the output for each input of y = 2x – 1.

To find the output value for the input value of -1, we substitute -1 in for y and simplify.(thing attached)
True or false?

A dollhouse is 2.8 feet tall. An actual house is 39.2 feet high. What is the scale factor?(thing attached)
True or false

Tell whether the graph represents a direct variation. If so, write the equation of direct variation.

Direct variation.
y = 6x

Not a direct variation.

Direct variation.
x = 6y

Direct variation.
y = 6x + 1

A model airplane is built to a scale of 1 in to 12 ft. If the model airplane is 11 inches long, find the length of the actual plane. Round you answer to the nearest foot.

132 feet

1,584 feet

13 feet

11 feet

Which functions matched the function table below? (thing attached)

y = x + 3

y = 2x + 3

y = x + 1

y = 2x + 1

Answer 1

1) False. You'd substitute -1 in for x, not y.
2) The scale factor is 1ft=14ft so true.
3) The first is a direct variation since y=6x is true.
4)The airplane would be 132ft in real life.
5) None of the functions made sense with the graph. I didnt really know what "thing" you were talking about on that one.