Question 3 (1 point)
Tobin is solving the equation 31% -1.25) = 11.25. His work is shown below.
3(x-1.25) - 11.25
3x-3.75 - 11.25
3x-3.75 +3.75 - 11.25+3.75
3x - 15
3x-3 = 45-3
X = 135
What mistake did Tobin make?
a
Tobine should have divided by 3.
Tobin should have subtracted 3.75 from each side.
Tobin did not make a mistake.
Tobin did not distribute the 3 correctly.
Question 4 (1 point)

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: