Answer:
The given equation is y = 6x - 30, which is in slope-intercept form y = mx + b, where m is the slope and b is the y-intercept.
Comparing the given equation with the slope-intercept form, we can see that the slope (or gradient) is 6, since the coefficient of x is 6.
Therefore, the gradient of the line is 6.
To find the y-intercept, we can observe that the y-intercept occurs when x = 0. Substituting x = 0 into the equation, we get:
y = 6(0) - 30
y = -30
Therefore, the y-intercept of the line is -30.