Ineed to write an equation for y = mx + b, the numbers i have are 20-80 and 1-4

y = 20x

m = 20 and b = 0

Step-by-step explanation:

For input values of x = 1, output value of y = 20 and for x = 4, y = 80.

Therefore, the equation of this relation can be written as  

⇒ 3(y - 80) = 60(x - 4)

⇒ 3y - 240 = 60x - 240

⇒ y = 20x

Now, y = mx + b is the equation and hence, m = 20 and b = 0 and the actual equation is y = 20x. (Answer)

answer: a and c are correct

step-by-step explanation:

the +5 is the vertical translation

the added negative symbol in front is the reflection over the y-axis