Your equation for A is correct.
Part B
To find the x-intercepts, let y = 0 in the equation shown in part A and solve for x.
To find the y-intercept, let x = 0 in the equation shown in part A and solve for y.
So, do the math.
45x + 30y = 1350
Let x = 0
45(0) + 30y = 1350
30y = 1350
y = 1350/30
y = 45
The y-intercept is the point (0, 45).
Let y = 0
45x + 30(0) = 1350
45x = 1350
x = 1350/45
x = 30
The x-intercept is the point (30, 0).
The x-intercept represents where the graph crosses the x-axis and the y-intercept represents where the graph crosses the y-axis.
Part C
To graph this linear equation, plot the x and y intercepts on the xy-plane given and connect the points with a straight line.
Look: plot the points (30, 0) and (0, 45) and connect the points with a straight line. This will yield the graph of the linear equation shown in Part A.