Question

write the standard form of the line that contains a y-intercept of -3 and passes through the point (3, 0).

Answer 1

At y intercept, the co-ordinates are;
(0, -3) and the second point is (3,0)
Gradient, m= $\frac{change in y}{change in x}$
m=$\frac{0--3}{3-0}$
m=$\frac{3}{3}$
m=1
y=x+c
Replacing for x and y using point (3, 0);
0=3+c
c=-3
y=x-3