The provided linear equation is y = 3 + 4x. The general form of the linear equation is \(\displaystyle{y}={b}_{{0}}+{b}_{{1}}{x}.\)

(a). On comparing the provided linear equation with the general form of the equation, the y-intercept, \(\displaystyle{b}_{{0}}\) is 3 and the slope, \(\displaystyle{b}_{{0}}\) is 4.

(b). The slope of the line is +4, so the gradient is +4. The slopes upward as the line moves from left to right.

(c) Considering the provided equation, the values for x=0 and y=0 is obtained as:

(a). On comparing the provided linear equation with the general form of the equation, the y-intercept, \(\displaystyle{b}_{{0}}\) is 3 and the slope, \(\displaystyle{b}_{{0}}\) is 4.

(b). The slope of the line is +4, so the gradient is +4. The slopes upward as the line moves from left to right.

(c) Considering the provided equation, the values for x=0 and y=0 is obtained as: