I solved the answers for the following. Although, I do not know exactly how to grasp the concept of the x-intercept? I don't know what x-intercept is.

The equation $\displaystyle 6x+8y+9=0$ has the x-intercept of ___ and the y-intercept of ___. It defines the straight line of ___.

My answers are:

x-intercept =

y-intercept = -9/8

Straight Line of Slope = -3/4.

The equation $\displaystyle 4.5x+7.3y+2.1=0$ has the x-intercept of ___ and the y-intercept of ___. It defines the straight line of ___.

My answers are:

x-intercept =

y-intercept = -21/73

The Slope is = -45/73

The equation $\displaystyle -5.2x+7.4y-5.6=0 $ has the x-intercept of ___ and the y-intercept of ___. It defines the straight line of ___.

My answers are:

x-intercept =

y-intercept = 28/37

The Slope is = 26/37