write an equation of a line that passes through the point (7,-4) and has an undefined slope.

Answer 1

When the slope is UNDEFINED, that means the denominator of the slope formula is ZERO

Slope formula = (y₂ - y₁)/(x₂ - x₁),

and the graph is a VERTICAL line and the equation of the line is x =7

Point (7, -4) is a point on the line.

Hope this helps...

Answer 2

An undefined slope is a vertical line and can only pass through the x-axis. Look at your point, a vertical line will pass through the point at x=7. 👍🏻