Answer:
0.41961
Step-by-step explanation:
Line the numbers up, multiply, move the decimal five times to the left.
8.4 because 6 would round up to 10 and 10+30 =40 for 8.40 or just 8.4
answer I got was x=6/139 or x=-0.0431655
Y=2x+6
gradient is found from the formula,
y intercept is found by subbing the values of (-1,4) into the equation y=2x+c