Infer linear rules and connect them to intersections and models.

Answer: −2

1. Gradient =315​=5.
2. Substitute a point into y=5x+c to find c=−2.

Answer: 17

1. The output rises 6 over two input steps
2. the rule is y=3x−5.
3. Solving y=46 gives x=17.

Answer: 12

1. L has gradient 2;
2. the parallel line has the same gradient.
3. Its given point gives y=2x+20.
4. Equate the two lines: 2x+20=3x+8
5. x=12.