Answer:
Explanation:
Assuming the top 2 are on cm grids they will all use the equation
y = mx + c (where mx is the gradient and c is the y-intercept.)
First one:
Gradient is found by using rise/run, it has risen 6, and run along 10, so the gradient is 6/10, or 3/5
the y-intercept is -1
y = 3/5x - 1
Second one:
Gradient = -2/3
Y-intercept = 2
y = -2/3 + 2
Third one:
Gradient = -6/2 = -3
Y-intercept = -3
y = -3x - 3
Fourth one:
Gradient = 5/3
Y-intercept = 3
y = 5/3x + 3