Answer:
Put the coordinates in the equation and solve for 'a'. (a = 2)
Step-by-step explanation:
Given the proportional relation y = ax includes the points (2, 4) and (-2, -4), you want to know how the coordinates can be used to find the value of 'a'.
Solution
Put the coordinates from either point into the equation, and solve for 'a'.
4 = a·2
2 = a . . . . . . divide by 2
