Pls \ help quick im being timed

y = 5/2x + 20

suppose: the line is y = ax + b

have: when y = 20, x = 0 => b = 20 (1)

                    y = 30, x = 4 => 30 = 4a + b (2)

(1),(2) => b = 20

              4a + b = 30

=> a = 5/2

    b = 20

=> the line is y = 5/2x + 20

Step-by-step explanation:

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)