20% because 9 divided by 45 is 0.2 which is 20%
Y=-x+8
gradient of the parallel line is the same as the gradient of the line given, which is -1
to find the y-intercept, sub the values (9,-1) into the equation we are finding which is y=-x+c
The y-intercept of the line is +5
Y= mx + b
The b is a variable that indicates where the line will pass through on the y-axis
