The points (2, 4) and (-2, -4) are plotted on the coordinate plane using the equation y = a × x. How can you use the coordinates to find the value of a?

you can replace the y in the equation with 4 or -4 and the x with 2 or -2.

then make like all equations you want to get a by itself

right now the equation should look like 4= 2a

now you divide 4/2= 2a/2

now the equation looks like this 2=a or a=2

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315