Lines, intersections and quadratic functions

Answer: 5

1. The gradient is 221−13​=4.
2. Substitute into y=4x+c to find c=5.

Answer: 5

1. Set the right sides equal.
2. 3x+2=4x−3, giving x=5.

Answer: 4

1. The gradient is 228−20​=4.
2. Substitute into y=4x+c to find c=4.