Answer:
y = - 2x + 9
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 2, then
y = - 2x + c ← is the partial equation
To find c substitute (1, 7) into the partial equation
7 = - 2 + c ⇒ c = 7 + 2 = 9
y = - 2x + 9 ← equation of line
