Answer:
y = 3x + 10
y = x
y = 1/2x - 8
The slope-intercept of the equation of a line is noted as:

Where:
m = slope
b = y-intercept
From the given equations, the ones that follow this format are:

y = 3x + 10 has a slope of 3 and y-intercept of 10
y = x means that the slope is 1, and the y-intercept is 0
y = 1/2x - 8 has a slope of 1/2 and y-intercept of -8